Updating Warm Up Regulator

I hope the collective wisdom of the list can help me. I have a 1982 911 SC euro and would like to know if I can update my WUR to a later year's version. My situation is that I have replaced my cat with a test (bypass) pipe with a an o2 fitting (my 82 euro had no O2 sensor). I fitted an O2 sensor and utilize it with a mixture gauge. I am looking for the better mixture control that should be afforded by a WUR that uses the input from the O2 sensor. Has anybody ever done this and if so what else needs to done?

Thanks,

Seth