For some reason, Jake went completely nuts a few weeks ago and decided that it would be a good idea to eat his crate tray. I must have checked at six or seven pet stores and I didn't find a single one that sold crate trays individually.
I finally found a store online called Mighty Pets that sells a variety of sizes and I just got Jake's new one yesterday afternoon. This thing is SOLID and there's no way in hell he'll be able to chew through this one.
If you're in the market for a crate tray, you might want to take a look:
http://www.mightypets.com/product.asp?3=2253