The Downey cross-over seems to have too many compromises just to make a kit for the do-it-yourselfer to install without welding. The flex joints I called Uni-flex (try googling) and they gave me a distributor closest to me, in Dallas.

93 4X4 ext-cab, auto, SR5, 3.4 V6, supercharged, 2.1" pulley, URD fuel mods, Aquamist WI, IPT valve body mod, dual cases, 4" superlift, Alcan springs, 33 BFG MT, ARB locked front & rear, 5.29 US Gears, RB 1" BL, 1.5" BJ spacers, TJM T-17, Warn m8000.