I had one cleaned, patched and sealed at Kirby Radiator on Belknap St. in Ft. Worth. Reasonable price and a good job.
I have spoke with Metalrehab a few times and they seem kool to deal with. I have been needing to get over to them for a dip...Centennial Radiator on Mockingbird and HWY 75 did a lot of gas tank clean and repairs (but not restored ) from what I saw a couple of years ago when I was there. Might be different now.