You can try Arron Johnson of badasscars.com he in in Napa and also have a very good line of videos at www.enginevideos.com that cover blowers in depth.
RBS supercharger there up on the hill some place rbssupercharger.com
I have found of great help from Monty at Mooneyham blowers down in LA, he has a lot of used parts pulleys end caps ETC, good lucK Laters Ben
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