I tired to buy one like you want recently and everyone told me they are no longer available, although you guys south of the Canada border seem to have a better chance of finding stuff.
I believe the bushing type for converter register is [FONT="]SKF B287[/FONT] or a 4338876
http://www.oreillyauto.com/site/c/search.oap?keyword=b287
I figured if the roller type is good enough for the newer vehicles it's good enough for a limited driver and the only time that bearing is turning is when the clutch pedal is pushed to release the clutch.