More detail to come...
Here is the COP (active) that fits perfectly in the head - it's a Beru unit from a Cayenne Turbo (Porsche part # 948 602 104 03, Beru # ZSE 012).
This is the socket layout - currently looking for connectors to suit.
It looks similar to the VAG connector on COP units from the webstore. Anyone know the part number?