Who /FP-100C/ here?
They've got this guide up on instructables to
get an old polaroid land camera to take normal batteries (since you can still use these types of cameras with FP-100c). Although not as instant as some of the cameras in this thread (1-2 minutes vs 30 seconds), the pictures do come out pretty nice. Its also cheaper in the long run.
Heres the guide if you guys want to check it out:
http://www.instructables.com/id/Resurrect-a-Polaroid-Land-Camera/