Thought I’d pass along a source for large sheets of thin hardwood sheets. Site is: https://www.certainlywood.com
Their specialty is veneer. Most of course is the really thin stuff - like 1/42". Good stuff, but not really different from other veneer sources. What seems to be a little less common is that they have 1/16" and 1/8" stock.
I want to emphasize that this is DEFINITELY NOT proofgrade material. It is raw veneer and unfinished. It comes in really long sheets of varying widths. However, IF you’re willing to work with it, there are some real finds. You will have to cut it down, since it come in long (8’+) lengths.
As an example, I ordered 1/8" sapele to combine with 3/4" sapele I have access to. I have a lot of projects combining CNC with my GF and having the two size stocks give a lot more flexibility. The 1/8" stuff was cut into 2’ lengths and shipped flat.
The 1/16" is shipped rolled up. (There is a BUNCH of energy in rolled up wood. It came in a box, with the rolled wood covered in paper. I cut the paper away and the wood “exploded”! Choice language occurred as it stretched to full length in about a nanosecond.) I ordered 1/16" wenge for inlay and now have enough to last a lifetime. I cut most of it into 6" x 12" sheets, reserving some at more GF lengths. Also ordered 1/16" cherry. It was about 13" wide and I cut it into 12"x20" sheets, more for ease of storage than anything else. Even the scraps were of good size and made a pretty sizable stack of usable material.
There was some warp in the sapele, but the gentleman I ordered from was very up front about it and the pictures clearly showed it. I’m still working with it, but with some moisture and clamping, it seems to be very workable. The 1/16" material lost the “roll” very quickly and appears flat enough to use “as is”.
Again, this is probably not the source for everyone. It’s pretty large lots and a lot of additional work, but some unique wood species, in large thin sheets, at good prices.