If you have to ask, you can't afford it pal ;)
I will try to see if he can use his 2nd gen LCA or any of the other people who make 2nd gen LCA to essentially use that as the 1st gen LCA, except locate the shock mount in the correct place.
Not sure if 1st gen LCA has the same dimensions as the...
I obviously do not like it, but I am a noob to everyone here so my word likely means nothing. Conversely, it is probably a nice piece to have if it fails on the trail/rock/mud course since it's modular. You can just take it off and replace/service the uniball on the bed of your truck or inside...
I asked him on IG and maybe it's a dumb question, but why not just relocate the LBJ uniball to the LCA like the 2nd gen? I understand it would require a lot of fab work but he already has aftermarket beefy LCAs for the 2nd gen with a uniball, so it he's not inexperienced in reverse engineering...