It depends on where you're located. The North American Commodore PSU is not safe to use, period. I have seen more than a few "purists" try the rebuild, but it usually costs them several RAM chips, maybe the PLA, and a few assorted other parts, and then a new power supply. It's far less expensive to either build a new power supply, or buy one. The North American Epoxy filled PSU just is not safe to use!
The European PSUs were build a little better, and at least can be rebuilt.
There is a fellow in Washington State (I think) who also makes great power supplies. He may be scaling back though.....