Internal mirror board

Hello guys, my girlfriend bought a used Mini One built in 2006. The radio key didn’t work, which according to the seller was on the battery, because he was standing around. So I was at the friendly one the week and ordered a new one. It cost me 140€. Three days later the good piece was picked up, unfortunately with my car, so I couldn’t test it directly. At home wanting to initialize, nothing goes. With the mini to the friendly one who tries again: nix There I got to hear that it could also be on the receiver. Grober new cost advance: another 240€ Ah, great.. They don’t take the key back, because special order and another 240€ for that they can radio and lock.. Thank you. Ok, then google asked where the receiver is. In the inside mirror. Well, the part is taken apart.. See there: PCB is broken (see picture) So, now my request: Where do I get such a new board? And possibly ni cht über den Freundlichen.. I’ve already looked for a completely new interior mirror, but I only find one for 150€ from Denmark.. I don’t have to do that to myself.. Info ́s, suggestions, always with it! MFG