5 or so film holders for 5x7. Cosmetics don't matter. Must be light tight, but I assume we all know that.
Also might as well put my unicorn out here: I'd also like a 5x7 to 4x5 reducing back for a Burke & James view camera. If you know of one available, or have one, I'd like to know about it and how much I'd have to twist your arm to get you to part with it. It would basically give me something to do with the 100-ish sheets of 4x5 I can't use now because some kids destroyed my Speed Graphic. Yes, I cried. Yes, I yelled. No, the parents don't actually know. *sigh*