N39A2 Dreamland Intelliheat electric blanket controller (Seething NR14)

Does anyone, by any chance, have one of these? It’s very frustrating - an electric blanket that has hardly been used - on a guest King-sized bed - is like new, apart from the fact that one of the controllers is not working. This model of controller is no longer manufactured. It seems a crying shame to dispose of the blanket (which is, otherwise, perfect) and buy a new one.