My guess is you would need to go through Randall/US music. I read your post on another forum so I am familiar with the situation. Is it possible to repair the amp without replacing the board? My RM50 had some current jump the traces on the power tube board and did some damage but I was able to remove the burnt trace and hard wire the connection. If that was the case with your amp, a decent tech should be able to make the fix for you. When I contacted US Music to buy another board for my Randall they didn't have any in stock. That was a year ago when they were still in production. That's what led me to just repair mine.