Go to a professional photo processing lab--they are the guys who do all the stuff for ad agencies, graphics companies--etc, they will be able to give you anything from 8"x10"s to the translucent things that they put on the side of bus shelters--there are usually a few in every large city--best way is to ask your photographer friend (assuming he is a working photographer) who does this stuff in your area--I have no idea what the charges are anymore--I once had a photo lab for a client and they brought me copy for their price card--1-50 prints were a dollar each, 51-75 were $0.75, 76-100 were $0.50 each--I was just glad I wasn't their accountant--