The manual version is 3.85 which is way to short for our cars.
The m3 has very different gearbox ratio's and a rev range that most n54's
will never see unless your starting of in second gear all the time.
The DCT is 3.17 and is perfect for most applications.
Anything different is custom on the E9x platform.
Best place I found to get them is out of uk, they have plenty.