Managed to get the freewheel off the wheel on the Miyata GT600. It seemed like it was rolling a bit ragged so I decided to repack the hubs. After removing the axle and bearings I found that the cones for the hubs were a bit worse for wear. One had some nicks on the outer rim (not directly on a bearing surface) but the other had a gouge on the bearing surface. I thought it would be a simple matter to replace them but I now see that cones come in a variety of shapes and sizes. The hub is made by Sansin, the axle is 141mm long and the axle thread I *belive* is 3/8 x 26 (measured using my $1.99 calipers). I'm not really sure what to be looking/asking for while searching for cones. Is it possible to find replacement cones through regular retail channels? Thanks for any insights you can provide.