I emailed them a few months ago about this and they replied with this: https://langeoriginals.com/products/jl-simple-and-hoist-a-cart-rear-hookI sent a note to Lange today to see if they have the kit for the Hoist A Cart to convert the JK to the JL. I'll post the response.
It’s $50 and replaces the rear hook on the hoist a cart. I bought it, but haven’t used it yet. Guess I’ll find out in the spring how well it works.
I’ve used the hoist a cart for two removals/installations of the hardtop on my JKUR. It was clunky and cumbersome, but it worked.