This place your talking about is called THE MAX. Definitly lots of high end cars but expect to have deep pockets they will poke your eyes out. I guess it comes down to you get what you pay for.I haven't lived in SA in a while but when I was there I drove by a shop on San Pedro and Jackson-Keller that always had a lot of high end cars parked outside. I even saw Tim Duncan standing outside a bay once. I can't remember the name for the life of me but I know they had a lot of rims and exhausts and maybe other stuff. Never stopped by so I can't say for sure.
You should contact the member taylormotorsports he is from SA and can probably help you out