I would not want to build a XJ in that mannor. The point of the build would be that it was a MJ. I wouldn't consider a Jeep without a MJ bed a MJ.
I could have sworn that www.aev-conversions.com built a XJ in that way. It looked very nice. But notice I called it a XJ. I couldn't find pictures of that on there website. I think they sold it a few years back.
I have a few regrets in my life. Selling my MJ is one of them. I can't wait to own one again. I just need a little more room in the cab of my next one. Don't worry I still drive a Jeep it just doesn't have a bed.
Thanks again everyone for your help on this!