Suppose the other alternative would be to fit fixed drive flanges off a later k74. Not sure if you'd have to swap the front axl to one with an actuator but can't see why you'd have to...

you would simply spin your diff constantly. Some people say it will contribute to wear and reduce fuel economy but I don't think you will notice on a 15yo commercial with 2Mg rolling about.

Diff has spun constantly on mine since 2001 and is one of the few original bits left