I rehabed my 1986 Load-Rite trailer two years ago. I guess born on dates that we are talking about says something about the longevity of these trailers.
Anyways, I bought my stuff from these guys:
http://www.trailerpartsdepot.com/ite...26%2E02&eq=&Tp=
Local price was actually higher because of some rule that they had with their dealers and/or manufacturers but the kid at the counter helped me out so much that it was worth it.
The funny thing was that before I replaced my retaining rings I lost a few rollers at the launch ramp and in the process of recovering them (diving) my kids found about 6 extra Load-Rite rollers and a handful of other brand rollers that someone else had lost.