Forgive me if this has been beat to death, but I can't seem to find all the info in one place. Polaroid's website says there is no more instant film from them. Fuji's website tells me they only have packs in 2 1/4 x 3 1/4. I read here that 4x5 is available over seas from Fuji...? So my Polaroid 545 backs are now fancy paper weights? Is there no film that will fit them? What model Polaroid back will accept the fp-100b (and it's brethren)? Will the FP-3000B work in my Polaroid 360? It used 3000 speed Polaroid films. I have a pack back for the smaller films but I can't remember the model. I loaned it to my father and it's not here in the house. I have been away from (analog) photography due to having kids and moving. I have no darkroom until I build another one. I thought I'd try some instant film out again since I have no darkroom but that's getting tough too, I see.