any one know where
 

does any one know of any companys that sell or can get rx8 rotors and an eshaft for a good price before i go to the dealer and buy them?

you have to be part of a race team to be part of that. does any one else know of any other shops that get parts for just little cheaper than the dealer

No, you don't need to be part of a race team. Solo autocross counts, and anybody with a driver's license can do that. You don't even need to win anything. The only downside is that it would probably take you about 3 months to participate in 2 events and get your membership activated.
http://www.scca.org/divisions.aspx?div=ne

you don't need to participate in any events to have an active membership.

Just send them pics of your car and say that your building it.

Good luck with that. Over the last few years, they have become a lot more strict on memberships. I know several people who tried that and they said no.

The regular membership is still easy to get if you don't mind spending the time entering the 2 required events.

Lets see, I did this around march ago, emailed pics and a race club membership and I still have a membership without ever having raced once.

It was most likely the "race club membership" that did it. If you have no race experience and are "building a car", they aren't going to take you in. However, if you have something other than just a "broken car" to show them that you are serious, they will accept the membership (i.e. racing club membership, racing license, past results using a different car, etc).

If your car is dead, then it's a little hard to get those 2 events. :) The problem is getting a membership to get parts to get the car running. A lot of owners try to join Mazda Motorsports to finish up their car "promising" to do the required 2 events after the car is running. They got sick of people never doing it as they were just trying to get cheap parts. So, they stopped making it that easy to get a membership.