Metcalf,
I apologize if this was already answered...20 pages long I probably missed it. But why do you want to remove the rear doors and keep it enclosed?
I don't see any advantage by removing the rear doors? If anything make the interior a little more spacious and leave the doors for better cargo access? Seems like an awful lot of money and effort for something with no gain? This is not a criticism, so please don't interpret that way. I am legitimately curious!
Again...if you already answered, sorry to ask again. Let me know and I'll try searching for the answer.
EDIT:
Oh and my thought on accomplishing this. Simply buy a JK-8 Kit and instead of using the shortened hard top that is included, get a custom fab steel box to cover the pickup truck bed, paint match, and call it a day.