Fourbrads,
Your picture shows that you disassembled the syncro clutch by removing the rings as the shop manual shows but you can usually determine the wear visually or by rocking the rings in place.
To the best of my knowledge the syncro rings are not available separately from the drum. You will also find them to be difficult to reassemble. One of the key components to look for wear in the rings are the large lug(s) where they engage onto the energizer spring on the clutch gear or second gear. If you have wear on the lugs and considerable "wobble" between the rings and the brass cone you need a new syncro clutch assy. Also check for wear on the raised portion of the syncro clutch where the shift fork rides, if it has considerable wear in that location it is over for the assembly. It will likely fall out of 3rd gear even with a new shift fork.
Fred
I went back and looked at your original pictures. The shifter portion of the syncro drum looks OK.
Last edited by rfs56trk; 11/27/2013 12:52 AM.