This thread will illustrate the steps needed to accomplish this, including any mistakes I make along the way.
The guinea pig going under the knife (ignore the rear ground effects, that project is posted elsewhere here on the forums):

Step 1: Find some doors to swap!
I find that using craigslist yields better results than Ebay for these kinds of things. I was able to locate a complete set of 6 doors from a newer van for $150 picked up. All doors are complete with power everything, door panels, speakers, wiring, mirrors, glass, and virtually rust free. If you are willing to travel a little distance, might I suggest www.searchtempest.com to search multiple cities on cragslist.
Here are 3 of the doors I picked up:


Stay tuned for more.