Hello, I need a replacement power supply for my Mac G4 Quicksilver (part 614-0157) but all the prices I've seen are outrageous. I am in the process of converting an ATX power supply for use in the Mac but I discovered that I do not have a +25V line. Is there an adapter or alternative power supply that will give me 25V? These are the specifications on the Mac PSU: +250VS 4.5A +250VL 2.5A I appreciate any help that could help me bring my Mac back to life. It is currently a stylish paperweight.