John and Becky,
I'm not sure I understand what you're looking for. The body of your message doesn't discuss the supercharger at all. Are you looking for a supercharger system or do you already have supercharger mounting brackets and so on? If you do have a mounting setup, whoever made it should be able to supply you with a pulley system, tensioner, and so on. If you don't have mounting hardware I would find a local fabricator who has experience building custom supercharger systems. I believe there is no off-the-shelf solution available for you at this time.
Hope this helps,
Chris Weisberg
Carroll Shelby Enterprises
(310) 538-2914