First, a fully equipped MKT weighs far too much to be pulled (or safely stopped by) a HMMWV unless it has been converted to electric brakes.
Second, There are people on the the big auction site that have the carry covers, roof canopies, wall pieces and the screening available, but usually not all at the same time. It takes time and effort, which if you don't want to invest the time and effort, well... you have a big, 5000 pound paperweight! If you have plenty of money to spend, I would suggest contacting EHMKE Manufacturing in Philadelphia, PA, as they were able to make four side wall pieces for me at a total cost of around $700. You do realize the complete set consists of 19 pieces - two identical roof canopies, four carry covers, six wall screen pieces, six solid wall pieces, and a winter skirt. And you will need to specify green canvas, green vinyl, or tan vinyl for it to be made out of.
