I have an idea for you. Im a Chiropractor in Denver and I have tons of old Xrays that we have in a trashcan in our xray room, they are films that didnt come out right or had to be taken over again. I usually throw one in my processor before I put a new film in to warm it up first. Anyway, you might stop by your Dentist's office and see if they have any films that they are going to toss. You would have to cut out the name area of course for privacy issues. Good luck. THe other ideas sound good too.