Outer Limits 4x4 Board

brought an mk swb and it has gu hub kit i have been told and one side for some unknown reason is missing the inner part to the locking mechism the bit that locks the free wheelin hub to the axle, can i just get a auto locking hub off a gu and put the guts of it into my free wheelin hub? are they same or different? or can you buy these free wheelin hubs second hand or new from some where? please help thanks

I don't know wheather this helps or not but I know the MQ free wheeling hubs don't fit on GQs but GU free wheeling hubs fit on GQs.

I think MQ & MK free wheeling hubs are the same.

So I don't know how a GU hub kit would fit on a MK.(confused) LOL

Cheers Mick.