There is a guy on the SCOA mailing list named Bill Kaiser that is with Apex Motorsports ( http://www.apexmotorsports.com/ )out of CA. They have a dual Kevlar clutch that I believe is custom. They sell a number of them to SCOA members and I have yet to hear any complaints.
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The Iron(FE)-Works
My daddy always said, "When you want to hammer a nail, don't do anything fancy. Just get a hammer and pound the son of a bitch."