Seems orion can supply a compatible one
https://www.cloudynights.com/topic/6...g-motherboard/
Are you sure the mount PCB is damaged, and not just the plugpack failed?
I personally cannot believe stuff that costs this much does not have reverse polarity protection based on that thread.... its 45c for a 20A mosfet for a near 0 voltage drop protection in single units, at 1000 units its like 14c,