Just a thought, maybe somewhere at BMW SA. Then there is the old BMW HQ building, the one pictured with a silver 5 Series in front, that's in all the e12/8 handbooks. The building still looks the same today, except there is no more BMW SA name on it.
.........oh, and you have to let me know which magazine, and when the article will run.......would want to get my hands on a copy.