I missed that photoYou missed out the important bit the makers label, I'm guessing looking at it that it might a lishui one. If so not much chance.
So the only solution is to change the whole controller system ?It's a lishui hmm, finding one will be near impossible.
Your controller is 11 years old they have move on in that time and won't sell that type any more. It appears to be unsensored I doubt one will see many of them now.
You will probably need to start again and replace the whole controller system cost will be approx. £100.