Anything made of ABS will work. You can buy sheets of it at Home Depot,Hobby shops, etc. Most other makes from the same vintage used ABS as well, so you can cut up a Ford Granada Grill and use it if you want. Quick test for the right stuff at a junk yard, burn a small piece, ABS should make a deep orange flame, light on fire as opposed to self extinguishing, and make allot of thick black smoke.