Another option to the Spyntec it is to salvage Ford spindles, stub axles, and lockout hubs. You will have to take them to a machine shop to knock off the lip on the wheel mounting surface. You will also have to drill 5 holes in your existing outer knuckes for the ford spindles. If you can source a set of 3rd gen outer knuckls, you can do the same, but you could run larger 3rd gen brake rotors and calipers. That way you get lockouts, better hub bearings, larger brakes, and all for about half what a spyntec would cost.
This option gives you many options in the future. you could change out the spider gears in the carrier and upgrade to 35 spline axles. Or you could install a Lock-right locker, 32 or 35 spline, and not have any adverse driving on the road, due to your ability to unlock your hubs for everyday driving on the street. I am in the middle of this project myself. Hope this helps