Hello: I need one commercially manufactured (not cut down from a larger sheet) sheet of film in any undamaged condition in the following sizes to test film holders I am manufacturing to make sure they are the right size and also to measure the thickness of the film itself. I will post these sizes and thicknesses after I carefully measure them. This may seem odd, but I have found that 4x5 and 8x10 films are not 4x5 or 8x10 but slightly different than those nominal dimensions. It is natural to assume that ULF sizes would not be nominal either. I could use sheets of different types of film as well. This is an opportunity to do something that will benefit a large part of the ULF community. I need 7x17, 8x20, 4x10, 11x14, 16x20 and 20x24 and any other size you think you might like me to manufacture. The film can be fogged, processed or unprocessed, in or out of focus. Darkroom mistakes are very welcome. I am happy to pay shipping and perhaps a small expense for something you would normally throw away. Please email me at firstname.lastname@example.org if you can help. Thank you.