Recover flash on Enterprise I/O board without spare...

I think I've done about the stupidest thing yet, I've managed to turn my
PCI I/O board into a CPU board, firmware wise (long long story, but to
sum it up, be careful playing with mknod and flashprom entries!), along
with turning some CPU boards into I/O boards, as far as the system can
tell.

I followed Sun's procedure at
http://docs.sun.com/source/817-4347-10/newPROM2.html that would normally
be followed for power failures (I bet Sun never imagined what else could
happen to their boards) and was able to recover the CPU boards since I
had a couple that still had the correct firmware on them, and I could do
the copy operation, however, I don't have another PCI I/O board to pull
down a good firmware to do the copy. Anyone know if there are any other
ways it can be fixed such as inside the OS or anything? Does anyone
offer a firmware recovery service?

Thanks,

Brian