I did the Firestone brand and installed it myself in my 2010 F150. It was pretty damn easy. Are you installing a compressor?
If not, I’d just do it yourself or find a buddy who’ll help.
I know you’re looking for an installer, but seriously, I gotta agree with these guys. Installed Firestones on a Chevy 1500. If you have a set of wrenches and maybe a drill, depending on the kit, you’re looking at a couple hours work. Less time than you’ll spend calling and driving to an installer.
I put an onboard compressor in mine and was able to do everything on a lazy Saturday.