[bill3rail]

First, I would start with asking everyone I know "Do you know anyone who does body work?" Find a recommendation to a shop or two.

Then, I would buy all of the patch panels needed so you know they are starting with all parts you would like replaced. Then drive the truck to recommended shops and ask for rough estimate.

Lastly, let them tell you what they will do instead of stating "I just want rust cut out and new panel welded in. Nothing else done." Then you can say yes or no to anything they are offering to work on.

Best of luck to you, and keep us posted on the results.
Bill