I am in Fredericksburg which isn't that near Houston, but I go down there a lot. It is tough to find a good cab in East Texas because of salt and the coast and humidity in the piney woods. What year cab are you looking for. This area has been picked pretty clean, but from here west and north you find more rust free cabs. I never recommend too many patch panels because you will get bogged down in patching and never finish the project. Farm trucks out of the Midwest make good cab donors because most of them have been in a barn all their life except for the harvest. And they are usually cheap. I recently bought a 54 2 ton GMC in Kansas for $1,000. I collect larger trucks, but the cab would fit on a pickup. I also bought a 46 and a 41 GMC 1 1/2 ton out of the Midwest for $850 and $750 and a 1 ton GMC for $450. They all only have surface rust.