For those wanting to do something wild with their SSK here is somethign i made in the summer:
This implies that a n54 stock lever is an alternative to BMP 128i ssk
EDIT::
More evidence of n54 OEM shift lever being an alternative to 128i 328i OEM shift lever
128i OEM:
128i SSK: Notice length below ball is 2x OEM, and Length above ball is taller by a tiny bit 5mm
n54 OEM: NOTICE: Almost 2x below ball, therefore a bit longer throw short then 128i/328i SSK, but Above is shorter than 128i/328i SSK & 128i OEM