Ecu change

I decided best way to sort car is th change ecu transpoder and key part number on my ecu 261 203 980 (7m) what other ecu can i use my a 96
 
a few of us run 1.3,s with a 1.0 ecu badfella, but prenats, nats 1 and nats 2 are different eh, and there are 2 types of nats 2 transponders eh (4 wire and 7 wire type ?)
 
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