do you still need a d1 box? I have a goodun 1.22 taken from my own 90 been drilled to accept the hand brake assembly. Only swaped to get a 1:1 ratio instead. I think it may need an input seal if i'm honest i remember it weeped slightly. Where abouts are you based? Make me an offer I'm in the process of selling stuff to fund some bits.
Jai