It's not a direct answer to your question, but I find the PVC boards very useful for cage building and much easier to source in lieu of the sheets. Maybe these are a workable alternative?

They are readily available at two of my local Lowe's.

These are the nice wide 9.25" planks. I used these on my rack build build. https://www.lowes.com/pd/AZEK-Actual...E&gclsrc=aw.ds