Very cool. I think you do links best on a toyota. If you could market your install as a DIY kit, I know more than a few people who would be very interested (myself included).
Its almost impossible to do that for the masses though without compromising the geometry. Mainly because when I build a rig I usually do the whole thing at once. Meaning, I will design and build the suspension based on dual cases being in the rig already or at the same time. Most guys aren't going to do that though as they try to build it in stages. However, the lower links need to be triangulated onto a crossmember to get the geometry where I want/like it. And, since the crossmember will need to be removable to get access to pulling the tranny/tcases you need them installed either before we build it or during the build. So, I would have to have two kits.
And, as you know, the stock Tcase isn't enough by itself for low range. So, duals or a single 4.7 Lefty is needed. Try to tell that to a guy on a budget and it doesn't go too well.
In the case of my old 2000 4runner, you literally needed to drop the front suspension out of the rig to be able to get the tranny/Tcases out.
I have been talking with Brian at 4wheelunderground about doing the link brackets for the double cab. His kit may lead to good geometry without having to remove a crossmember, but he is still designing it for a driver drop at this point. But, his link system welds to the inside of the frame rails without a crossmember up front. I just need to plug in the numbers based on my truck and see if I like what I see. If I do, when I build it, then I will likely push people to his kit.
IMHO, there is no "universal kit" that will accomplish the perfect geometry for anyone without doing it all at once.