I get contact prints of my 220 rolls done at a local lab (Icon in LA). They use 10x12" paper. I have not found a way to store the contact prints so they stay in consistent order with my negatives. Are there special binders or boxes that I can use without having to trim the sheets? I've got about 2000 sheets piled up in a box, so if there was an easy way to file these, I'd appreciate the advice.