If you have not found anybody yet, try RV Masters on Bingle 713) 461-2300. They do that kind of work and might do it on site. I have been VERY impressed with their work.
Suzie & Chuck USNR USAF USCGA
Challenger Owners Club
2015 37KT Challenger, Demco Commander tow bar, Ready Brake, Sewer Solutions, Safe-T-Plus 41-230, 5-Star tune with 2014 Ford Fiesta behind us & 385 FastTrack kayak inside.