Patch panels are available for these areas lower cab corners aren't to bad to change but should be welded in. As far as side panel of bed that is a bit more work in fact its easy to mess it up, thats a long streight panel. The big problem is what you see is not all there is. I would suggest you buy or at least look into buying a bed. There are plenty out there for around $500 or $600. Where your at there should be places to check with. What year is the truck?