problem with buying an original board is its a time bomb, once the main chip dies then your back in the same boat.
I did repair one of these boards with a proto type replacement re verb / echo circuit.
not sure if my supplier is willing to sell me another one.

the think is i have to silicone or hot melt glue the mini PCB in place.
But last time i used silicone to hold something in place on a PCB all hell broke loose.

my advice is buy an after market board with modern components not a second board with a potential to land u in the same predicament.