I would do it myself get a bunch of scrap metal and practice on that before you start on your truck I also never welded on sheetmetal before this project but there are some online welding sites that would help get you started,once you get in some practice on scrape it does not take long before your welding on your own and the money you save you can get more stuff for your truck. Do a search on auto body welding you'll see,do you have a mig welder already?If you do get some .023 wire and practice on scrap.

Good luck,Pete