Here is a pic from Baur owner HarryPR at the Vintage in Old Salem, NC last Memorial Day.

Thanks to some help from some guys in another forum, we have tracked it down: Terry and Deb S. In Texas!

Here is the story, in their own words, of how they attempted to put an M3 engine in a 2002 Baur Targa in three days!
http://baurspotting.blogspot.com/2012/10/m3-engine-into-2002-baur-targa-kudos.html