Have you checked out:
http://www.bmcg-gearbox.com/services.html
As per the front diff from the .2
Are all parts that attach to the diff assembly interchangeable between .1 and .2
E.g. axles, seals, driveshaft
If all those parts are the same that might lead me to believe that swapping out electronics (sensors, actuators etc) might make this backward compatible.
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