There's a couple of local guys who do side work on DSM's here in the Plano/Richardson area, but no shops close by. 2Bar Performance is in Haltom City, but I've never heard anything about them yet.
http://www.2BarPerformance.com doesn't have any info available, since the website is getting redesigned. What did you need to have done to your car? One of the local guys I mentioned might be able to handle it.