Is it possible to have a guitar with two humbuckers and take one of the humbuckers, take a coil off and replace it with a single coil sustainer pickup and still use the coil of the humbucker left over as a single coil?

Yes, thats a messy sentence but I really cant word it any other way.

Also, does anybody know of cheap sustainer pickups?
erm i think i know what you're talking about......but i dont think it can be done, especially as the sustainer pickup is active as well, but the only one i know which you can buy if the fernandes sustainer system......but i have no idea where to get one from or how much they are.

Or you could use an ebow to get pretty much the same effect