Larry I get some stuff at work that is probably .005-.010" thick and I am sure if you ask some of your local retailers (walmart,target) they could spare you some.The only thing I noticed with the clear plastic that over time sometimes it yellows and really do not know what to say to keep it from happening.I use this stuff alot for gunsight reticles now if you like me to send you some let me know I have a plenty(free free free) some up to .020" probably.You may have to experiment with it some it seems like the culprit is sunlight.Kevin