Allan,
If you want to go hang out and mess around after the car show, there is a group that usually does that (talk to MYNSX, in his yellow NSX), as for performance, I don't know if you have been to Scottsdale Lotus already (they have Lamborghinis for sale there) but there is a small shop called 'Global Motorsports' right next to it that specializes in exotics (don't know all the details, never been in there). But your best bet would be Apex Racing in Tempe (VERY Popular company out here!), they can get pretty much everything you want for pretty much whatever car you need it for, cool guys that work there too. I was looking for months for a certain set of rims that I wanted and wouldn't accept another style, Apex got them for me, they had to go overseas, but they werent bothered at all with my special request.(By the way, Almost every Supra around here has bought stuff from them because they can get everything). There number is 480-967-6515, Victor, Ben or Andy should be able to help you.
Hope that helps, if you need directions to either Global Motorsports or Apex, just post here again.
Hope that helps.
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1992 NSX Red-Black 5-Speed