Be well aware that IF you find any of these parts, they will be gone in a matter of hours... not days.
I've seen a few kits pop up in the past (usually one will come up once every 6 months or so), and when they do, they regularly sell for 5k or more, plus shipping.
You will have NO negotiation room whatsoever, and unless you can pay that person ASAP, they will be gone faster than you can blink.
My personal opinion is that you're far better off buying a used TJ with an AEV kit already on it, swapping the kit onto your TJ, then selling the other TJ.
I'm not kidding about that either.