I have a brand new, in box JB Conversions SYE for an NP231. I never got around to installing it, and now that I've bought a new vehicle I decided I should get rid of some of the jeep stuff I have sitting around. Per their website, they've got it priced on sale for $169. I'll take $150 for it. I'm located in Crown Point, IN and am willing to ship on the buyer's dime. Or if you're going to WF and find someone in my area who is going, I'm sure that they wouldn't mind bringing it...
Edit: forgot to mention I have a front driveshaft from a 99 xj that I'll throw in for an extra $10
Edit: forgot to mention I have a front driveshaft from a 99 xj that I'll throw in for an extra $10