FM Hidden Hitch setup. $170 gets you the hitch, trailer wiring kit, and the 1 7/8" ball.
http://www.flyinmiata.com/index.php?...1000%20%20BALL
http://i1124.photobucket.com/albums/...i/IMG_0978.jpg
Applied Racing Technologies front NB hubs $280 (Brand New)
These are the same ones that FM sells for $185 per side. They are the standard stud version.
http://www.flyinmiata.com/index.php?...%20LONG%20STUD
http://i1124.photobucket.com/albums/...i/IMG_0995.jpg
http://i1124.photobucket.com/albums/...i/IMG_0996.jpg