Audi A5 2.7 V6 2nd Hand Engine ECU Purchase

Hi.
I'm looking for an Audi A5 2.7 V6 engine ECU.
Part number of ECU is 8k1907401E Bosch No. 0281016253 with engine code CGKA.
Appreciate if someone can help me find a second hand one with same part No. or one which is compatible.
Original ecu is damaged and doesn’t start the car.
Thanks.