Looking for CC products, they still make and sell a very-reasonably priced triple-clamp which most would say is a HUGE improvement for the rubber-cow...
Find it here.
(the link is funky, for some reason, so just click on the blue and white "CC" along the upper left side, lots of yeehaw! parts for airheads....)
Just know that the rubber stops that you "can't find" are probably there, but not in any recognizable form...
Yes, that WAS the rubber stops....
EDit: oops, I just re-read and I now think that you have a R100 front end, not the /5 front end... oh well, those "stops" above are just as real....