Yes Bigazzi ran Soper and Pirro in 92 for the DTM, but mine is the Pirro car. The Soper car is in Luxembourg, and currently for sale if you fancy one?
http://www.artandrevs.com/bmw-m3-dtm/en/pr-79-1
My car was Paul Morris' Diet Coke car for 1993 (the "sister" car if you like to the one above) and I bought it a couple of years ago in an unfinished state from a guy in NZ. It was last year that I discovered its actual 1992 DTM history, when the original logbook resurfaced in Europe, and I managed to buy it off the guy (ex Bigazzi mechanic)
Here is a more detailed description describing my short history with the car
http://www.m3motorsport.co.nz/projects/1992-bigazzi-dtm
Conrad