Power supply for 715/100

The power supply in my HP 715/100 seems to be shot.  When I turn it on,
the LEDs flash and the hard drives start to spin up for a split second
and then the power cuts out.  Occasionally, I can get it started if I
disconnect the drives or use just one drive, but most of the time it
doesn't work, or it dies after running for a few hours.

http://lists.parisc-linux.org/pipermail/parisc-linux/2001-March/012076.html

I found a post in the parisc-linux archives from someone with the exact
same problem with his 720.  What are my options?  Does anyone have a
extra power supply from a dead box or something?  It looks like a few
people sell HP replacements for > $100 which is not worth it.  I might
just be better off buying another whole system on eBay.

Thanks,
David