Dave,
These are the ones that I bought:
http://www.commandospecialties.com/Prod ... ProdID=165
The bag they were in was labled RGM. I don't have the stiffening plate mod, or the spindle mod. Maybe I'll get around to them some day. I arced these shoes, with stick on sandpaper to the drum (seems like 180 grit, don't remember). Removed very little material. This method has worked for me on numerous bikes for years. Just to make sure there aren't any high spots, and that the lining makes the most contact it can with the drum. The stopping with this setup is way better than the previous EMGO shoes that I had. Like mentioned before, I don't know how long they last, but it's the best bang for the buck on a Norton twin leader.
don w