Back at the topic...XAT racing is off Dale Mabry(right next to Stadium Toyota and Daewoo dealership), Racing Zone is off Kennedy Blvd. (sorry, don't know what street it is for sure). Those are pretty far away from you but I don't know about any around your area. I'd just open Yellow Book and look under Automotive. You shouldn't have any problems finding shops around here.
BTW, welcome to Tampa
Hope this helped you a little