A Sun PSU should work. From the Windy II in my possession, it had the same PCB connectors as a Sun PSU. You'll have to rewire the AC and the connector that powers the JVS I/O. You should look to repair it though. Might be a fuse if there is one in your Windy II PSU. Sadly, I can't look at it now. But PSU's are the easiest electronic component in a cab to repair (I know, I know, you're in paradise and soldering electronics is punishable by death out there
)
FYI, I did test voltages on the Windy II in my possession before I plugged in the Naomi, after some adjustment, I got perfect 3.3v and 5v. 12v was a bit over, but that wasn't a big deal.

FYI, I did test voltages on the Windy II in my possession before I plugged in the Naomi, after some adjustment, I got perfect 3.3v and 5v. 12v was a bit over, but that wasn't a big deal.