The price for brand new ecu ist 1300€ in the moment and it seems you are located in germany. There are a lot of advanced "tuner" workshops.
Anyway how did you destroy it? I expect playing with china tools...?
I know it was my fault. First I read and flashed the ecu with kess clone on obd. The car started without errors. After four days the car no longer started. The ecu was no longer accessible with vcds. Next I tried with FC CG200 on bench. That didn `t work. I could only read the ecu with pcm flash at bootmode. But I think the data is bad.
the seller of the new ecu is "oemvwshop"