Adding third tow seat in 2002 grand cherokee WJ

I know it is more common in the Wranglers, but I want to add a third row seat to my WJ, ideally a fold and tumble. I have seen a few post pictures of people who have done it. What I want to know is how!? What kind of brackets do I use? Can I use a back seat for a wrangler? Where to attach seatbelts, directly to seat or where on the body? And is there anyway around the seat blocking access to spare tire?



I know it will not have much leg room and it should go rear facing for better safety. It will be for small children.



I know little passangers has custom made ones, but they are expensive and take 8-12 weeks to ship some times longer.



Thanks!