Not sure about ordering but I'd check out Trans Ware Transmission Limited in Concord. They built the tranny in my car, I beat the **** out of it and its handled everything well so far. Paid about $2500 for a built 4L60E.
95' Z28 - LT1 385ci 11:1 comp - Canfield heads - 220/230 .550 .560 cam - Hooker LT's w/ dual cats into 4" single Mufflex - 10-bolt w/ 3.42 - built 4L60e - 2800 stall (POS) - C5 brake conversion
12.2 @ 116mph on shitty summer tires, no traction
to do: yank ss3600, dana s60 or Ford 8.8, drag radials