We're in the same boat, Iron Man. I don't think the regular Sports Suspension can be ordered a la carte, so I'm asking my dealer about adding the Performance Suspension which everyone says is better anyhow. I believe the latter, when ordered with the car, is installed at the port during delivery prep.
But looking at the config guide again, it appears I misspoke before. I now think ZED can be ordered with M-Sport on the 128i (not the 135i though) but unless BMW discounts the combined price, there's even more double dipping because you're double paying for wheels/tires and interior trim. Hopefully the online configurator will be updated soon so we can figure all of this out.