This place makes some cool parts for the R's. He has clutch parts that are no longer made and also makes water pump hose barbs in several colors. They also make these barbs with an AN male fitting. I use AN's at my radiator and love to use them anywhere I can on other projects. Just figured I would let you guys know if you did not already.
I could not find these listed, but he responded quickly and sent me a pic so if you are looking for something you do not see send them a message.