Actually the lower shock bushing on that shock is a newer nylon (sorta green in color) and will work on the upper and lower Valk (or VTX) shocks that use the rubber. This is a newer harder neoprene or nylon type material..... I replaced my Valk bushings and a set of worn out Gary's bushings with those, and works well so far. Very inexpensive compared to the original black rubber ones....
Honda new green bushing no. 52489-HN0-671 (will fit VTX and Valkyrie). Much better than old stock rubber.
Here is an interesting read regarding shock bushings on the VTX message boards......
http://www.vtxoa.com/forums/showthread.php?t=242281&highlight=shock+bushing