First off, the company who makes the barrel doesn't necessarily "float" it. If you're looking for a gun smith who can chamber, install the barrel, and do the stock work to have it floated then that's something else.
Barrel manufactures to try...
Rock Creek
Krieger
Bartlein
Obermeyer
Gun smiths are almost as plentiful. I don't know any around Oklahoma City, but G.A. Precision out of Kansas City is top notch. Also contact William Roscoe at Louisiana Precision Rifles.
Call Parry Custom Guns in Vici OK. They are open Wed - Sun ask for Matt and tell him the boy from the Bayou sent you. He can get the barrel and do the work.