As Kevinsky said, a lot of work to swap a whole dash. No patch panels are available for that trucks radio area. We don't have any pics of your dash situation to judge. That keeps us at a handicap. The best advise by far is to obtain a donor radio section and piece it in.
From what see from pics of dashes, it is possible to fab a piece as Evan has shown. It takes some skill, but not a high tech piece to make. you just mend the metal over a pipe, you don't hammer a piece into shape in this case. DIY Pipe Anvil.
