We have been without Polaroid in the UK for over a year now. Fuji make a pack for the type 100 Polaroid Back. The problem I had was for 5x4 cameras as they only do a ten pack which fits their own back which is not available in the UK.
FTA:
"Polaroid will re-launch the legendary Polaroid One Step Camera and is therefore commissioning The Impossible Project to develop and produce a limited edition of Polaroid® branded Instant Films in the middle of 2010."