rsrr,
why not just get them from your local 600 dealer? If you don't have a local dealer, I have these in stock, and would be happy to ship a set to you. I know pricewise they are about the same as you will find from NAPA, Autozone, etc...
I don't know the part number off hand, but would be happy to get it if you still need it.
If you want to order these, my number is 585-721-1795. I will ship them right out.
Brad
NorthEast Legends
brad AT Northeastlegends.com