I got a 150 with a dead hard drive that made a grinding noise and I figured I had nothing to lose so I took the cover off the hard drive, gave the motor a few turns, made sure there was no dirt or anything loose floating around in the case, put it back together and it booted up fine with no more grinding sounds.

Dead 1xx Powerbooks are common as dirt, so you should be able to find one with the parts you need easily. Just don't count on getting power supplies or batteries with them.