Here is alink to a company that bought some surplus supplies from Adaptec/SnapAppliance.
http://www.northwesttechnical.com/
As far as do a cpu swap Not me. You will proably have to do a some kind of mb mod. As models changed so did the pin out. I saw this done on an old scanjet5 network scanner. Remember the PS is only 50 watts. Not any reserve if 7200 rpm drives have been added.