Not mine however I'm plenty familiar with the seller and believe him to have unquestionable character. This diff is a rare bird and as far as I am aware is a direct bolt in to an E9. Please feel free to correct me as I've never owned either, but thought coupe owners might want to see this.
http://www.mye28.com/viewtopic.php?f=4&t=141260
http://www.mye28.com/viewtopic.php?f=4&t=141260