I have a kit I made using different part. The only part now which is atvr is the axle. The rear shocks are your most expensive part. One can do a wide body kit by doing it your self using race car parts,stock shock and atvr axles. I 'm presently working on a kit using a shock that has low/high compression and rebound that will give you 11 inches of travle. I did find a supplier to make a whole new axle assembly but at a price of $800.00 a set.
What one must do to go LT is widen the rear either buying atvr arms and axles or lenghting yours. The I rod and radius rods can be purched from atvr or race shop and use shim stock to take from inch to metric. The shock atvr uses is big and requires lots of mods. The big shock is compression only due to the shaft lenght. It's to long to drill out for rebound control without snapping. A low/high speed compression is way better. And rebound settings help dial in for different riding areas. Instead of letting the shock dictate your speed adjust the shock to your speed. I used a custom built pair that bolt up to the stock locations. These came with a price but I like to ride fast and aggresive. One other thing to consider is moving the rear back it takes some of the low speed kick out of it and applies more front traction for corning. You can look over my post on my LT set up for ideas or just ask and I'll help in any way I can.
Look forward to a post in the future on my wifes LT kit using the new set up. The front will have 9"( non bump steer kit) and the rear 11". Plus four front and rear. The shock package will sport fully adjustable for under $2,000 for all four. She may even get disc as well if I can find parts. Theres has some reports of snapping the atvr axles. This is why I will install all new set up that Bolt right up with out disambley of the joints. They will be full replacment sets and stronger as well as rebuildable. I will post info I get them from mfg.
Good luck and have fun and plese share pics.