I present a new option
e36 m3 lip on 128i
Part 51112251767 comes in satin black from factory
or the cheap urethane/poly DDM e36 m3 lip replica, ( if DDM is still in business and has it in stock)
One possible DIY:
http://www.understeer.com/lipspoiler.shtml
The fit will need modification on the corners, applying heat, but I think this is fantastic possibility.
Does anyone know how flexible this lip is???
EDIT:
Not flexible, ridgit
Will require using heat gun and cutting our triangles to help bend it
It is about 61 inches wide with large over hangs due to square shape
our bumper is the same, with small over hangs( 157cm = 62 inches)