Just found a few tutorials to make a sustainer on the cheap. I am having some trouble understanding a few things though, maybe someone more electronic savvy could help me understand. I see about what he's doing, but I don't understand what he's using as the "driver", I can solder my ass off, but without schematics...I am completely lost. I do have an old crap pickup lying around I'd love to try this with, but I need to do a bit more research and hopefully find someone to help me understand exactly what i'd need too.
This one's most detailed
Psw's Sustainer Pickup/driver Pictorial - Project Guitar Forum
This one is less in depth, but has a list of materials needed
DIY Sustainer : DIY Fever – Building my own guitars, amps and pedals
It will be cheaper, easier, and less of a pain in the ass to buy one. Will also likely work better too.