Dr A, I read your post in another forum on this site and I am having a hard time putting 2 and 2 together. If you check the online wheel resellers, specifically Motowheels, they list fitment for my bike as follows:

"SS Monster to 01"

Wouldn't this suggest that the SS and Monster share the same rear wheel during this period? Doesn't the ST also share the Monster rear wheel as well during that time? Maybe you were trying a later wheel on an earlier bike or vice versa.

Not doubting you, but still holding on to the hope that there is a fairly easily souced OEM take-off that will work.