I think we've discussed this one on here before too so it might be worth a look.
www.autobodystoreonline.com has people who know plenty about this stuff.
There's an Eastwood kit for this that sounds like it would do a pretty good job. Classic Trucks replaced a cab-corner in their Feb issue using the Eastwood kit. I'm interested in trying this method too. I've also talked to a guy in a body shop and most of their work is with adhesives now and he believes it's better than welding for non-structural things. He seems to me to be a non-bs kind of guy with lots of experience with repair.
Greg