Finally scored a missing piece of the puzzle:
Racing Dynamics Non M lip
Unfortunately I wasn unaware that the lip is slightly different between the two non M bumper styles so I will have to make some reliefs in the top of the lip to fit around parts of the bumper vents. The good thing is that the lip isn't perfect and needs some fixing anyways.
You can see the small semi-circle reliefs now that are for fitting around the vertical slats in the wide slat style non m bumper. Those will be filled in as well.