Ocooch hardwoods

I'm having a heck of a time finding places to get bamboo ply. Inventables is about the only place I've found that has 1/8 12x24 and it's currently out of stock. But all the big laser shops seem to have plenty of bamboo options so it has to come from somewhere!?
I'm waiting on an order of birch and hardwood samples from Ocooch Hardwoods which I'm rather excited about, but they don't have bamboo.
I feel like I have to be missing something obvious?

I currently purchase wood from Ocooch Hardwoods, but their maximum width is 12in. I’m looking for someplace that has hardwood (not plywood) at larger sizes like 24x24. I’m not sure that even exists, or if sizes that big have to be plywood. Anybody with experience burning large, single piece hardwood boards? Thanks!

My laser works perfectly. Couldn't ask for more from it. My issue is the damn wood. I am having a hell of a time sourcing flat plywood.
My laser is a "50 watt" cheap chinese laser. So I am mainly cutting 1/8 and 1/4 inch plywood. I feel like I have tried everything under my control. Normally I order from Ocooch Hardwoods. This last batch I ordered 20 sheets of 1/8 inch Baltic Birch ply. As soon as I received it I put 70 lbs of weights on the stack to try to keep them flat as possible and a couple days later they are warped to all hell.
On my bed I currently have two steel rails that i use to support the wood and I put magnets on top of the wood to hold the wood flat and even that doesn't help enough.
Occasionally the bow in the middle, whether it is higher or lower than the steel rails, becomes out of focus. Even if it stays in focus, when the wood is cut the internal stress cause the cut portion to bend up or down out of focus for the portion that is about to be cut. I put in tiny breaks in the lines so that i could manually cut those pieces so it would hold the wood where it needs to be and that has helped but this is extremely frustrating.
I really enjoy the hobby/side hustle of working with the laser but it seems like the issues with the wood are out of my control and its pretty demoralizing.
I have considered switching to MDF and I have a sheet of quarter inch MDF that I plan on trying to see how much that will help.
Any and all suggestions are welcome. I briefly considered switching to a lens that has a longer focal range for cutting, but I got lost in not being able to find good info on how to even upgrade it. I thought I could swap out the lens for another one with the same diameter and move the workpiece further away but it seems like I would need a different lens tube as well? Any good info there would be super helpful too.

I've been using an 60W Epilog for projects mostly involving cutting 1/8" birch plywood.
I'm looking to make something fancy and want to use some of Ocooch's more exotic hardwoods (ocoochhardwoods.com/scroll-saw-lumber). The list includes Alder, Basswood, Butternut, Bubinga, Canarywood, Cherry, Curly Maple, Lacewood, Mahogany, Maple, Oak, Padauk, Poplar, Purpleheart, Walnut, Wenge, Yellowheart, and Zebrawood. Some of these are utterly gorgeous. I'd ideally like 4 different/contrasting woods for this project.
I know next to nothing about wood types, other than wood type matters a lot when laser cutting. I would LOVE to hear from people who have experience cutting any of these woods, particularly at thicknesses like 1/8"/3-5mm - whether it's about woods that are good for cutting, or woods that are bad for cutting.
Thank you!!!

A buddy of mine has a cooking business and wants to start buying cutting boards/decorations from me. I have worked out that I could get about 5 shaped cutting boards from one of Ocooch Hardwood's 6' piece of intarsia lumber. However, I am looking to maximize my profit margin.
Walnut is hard to find down south, but I have a source. If I go pick up an 8/4 or 12/4 board of walnut, how can I get it cut down? The lumber place doesn't have a saw... I know I can resaw, but do not have a big bandsaw and my table saw can't resew a 12" board. Should I contact professional sawyers to see if they can help?
TLDR: Making things for sale, trying to maximize profit, love Ocooch but too $$$, any ideas?