There are probably more than a few project trucks sitting gathering dust, because the owner either ran out of money, time, or patience that could be picked up for pennies on the dollar. Find one of them, and you'll be well on the way. Your mostly complete truck in good running condition should command a good price from an old truck enthusiast whose only "restoration" talent is the ability to write a fat check. Yes, there are a lot of guys like that out there! Take the bucks you receive and use them to build what you would really like to have.
Jerry