You have two authorized shops in the Dallas area.
John Eagle Collision Center in Dallas
Trade Secret Auto in Plano
I took mine to Trade Secret and I'm fairly satisfied with their work. The most important thing to me was the paint quality and it looks just like OEM. Their communication was horrible, but once I escalated it to the manager it was much better. The guy they have working there, he knows Tesla inside and out. I got to talk to him and see him work, and he's incredibly impressive.
I would recommend Trade Secret since they are very familiar with Tesla.