Getting Replacement Parts For Sun Clones?

Autoversicherung writes "Two of our production servers started to act up last week and after a few hours of testing and swapping in and out hardware we nailed it down to the power supply. Great, we thought -- probably the easiest part to get a replacement for. Was I wrong. The power supply was specifically made for Sun clones, and contains one standard ATX 20-pin and one EPS 24-pin connector to the motherboard. The original power supply is no longer in production, so far I haven't been able to dig up any suitable replacement for it. Am I able to modify a new PSU? I know how to use the tools required, I'm not sure what the implication are for things like 'separate voltage lines for each CPU complex' etc. The servers in question are EVU450 from Tritec, AFAIK clones of the E420R Sun server. The original Sun parts don't fit, though. Am I out of luck?"