Hello @JeremyNielsen,
Yes, I have used cork fabric. I find it to be pretty durable. The back is fabric (a cotton/poly blend). You might have a durable product if you sew two backs together.
I tried to engrave on the cork. It comes out a bit rugged looking and is lighter than what is engraved in wood or leather (IMHO). I purchased the fabric at thethackery.com.
Here is a link to the thread on the cork wallet I cut out. I used the 6-Pocket Bifold Executive Wallet from the Glowforge Catalog.
I’ve been using the wallet everyday since I posted in November. It’s still holding together.