[suicideneil]

Tricky one. If you can work out exactly how long the shafts / dogbones need to be ( upto -5mm say ), then chances are there may be some 1/8 buggy, truggy or MT ones the correct lengtt. Just requires a bit fo searching around- googling the length you need often brings up several options I've found when it comes to random lengths.

As for drive cups, even hardened steel ones seem to develop little dents over time- not much you can do about it, even if the drive pins are a perfect fit with no slop. I'd consider them an item that needs replacing every so often, just like slipper pads and clutch shoes etc etc.