4 Wheel Drive?

[barnettd]

In 2007 and 2008 they apparently made 2WD Wrangler Unlimited versions. Long shot question. Anyone ever retro fitted one of those to 4-wheel drive?
I did try a thread search, and I am pretty sure I am out there with this one.

 

[Cimmerian]

It would be way cheaper and less of a headache to just get one that's 4x4.