Fishman2020

I have a jacuzzi tub that has a bad controller board. This would be an easy repair but I can't find a replacement board. So, I'm looking for some advice on how to move forward with this repair. The board I currently have is a Balboa 25300 Rev 1d. I've searched for rev 1 through rev 4 and can't find anything? Any suggestions on who I might call to acquire this board or maybe it's as easy as buying a new controller to control the tub? Thanks for any assistance