GgordonN,
Can you post some pictures (closeup) of the drive cones so that I might be of some help.
I would look at moving the disc inwards but you would have to be carefull. The pictures would help me direct you in the right direction.
Have not had any luck locating cones but another suggestion from one of your other post you mentioned that they had brake pad material on them. You could get the material redone by a brake pad specialist.
