Just bringing this back to the top for you.
Here is a thread you might not have seen yet: http://www.jeepforum.com/forum/f13/h...rsion-1537012/
where they're talking about doing the u-joint replacement.
Even though that's not the way you want to proceed, it sounds like they've done some of the CV changes already, so might know the best way.
Have you checked at a local driveshaft repair shop yet? I would think, as it's a standard wear item anyway, that just about anyone that works on drivelines could build, replace, or order a new one for you pretty easily.
Plus, on the gambling side of things, you could probably find one in serviceable condition in a junkyard too.