I use Stan Smith, North Alabama Aviation, Decatur, AL, KDCU. He is good and has a lot of experience with Comanches. It would be about a 2 hour flight north of Destin; 6.5 hour drive. Although I am sure there must be someone closer.
You could also ask Matt Kurke if he could help or at least advise you where to go. Matt is a Comanche expert, the foremost expert on Comanche landing gear and he's in Naples, FL. Check out ComancheGear.com.