Greg,
Your questions are normal. Don't appologize for needing info. That's why the site is here.
I have never had to contact Lisa. Just know that people have had good things to say about her.
Sorry that she is not returning your calls. Have you tried email? Might be on vacation or out sick.
Can the cars bind the springs? Yes... If they are not set up properly. "Is it legal"? Why would you want to?
I am using the old Carrera shocks because I am running a venue other than USLC. Not sure as to valving options on the Bilsteins. Sure they are available.
I have some Carerra, Hypercoil and AFCO springs. I think that as long as you are in the ball park with spring rates you will be ok.
There are some parts that are only available through USLC or their dealers. We have several of those dealers as members here on the site.
There are a lot of parts that are universal and can be bought from dealers other than USLC. We have dealers here on the site forthose part too. You'll have to shop around a little, or advertise your needs.
Are your spindles the current aluminum ones or steel? Check the USLC site and download the current rulebook to make sure the car is current on updates.
Steve