"Lost" 17mm hex bit socket

I participated in the DIY at AtSpeed Motorsports in January. I loaned a brand new 17mm hex bit socket to someone who was changing his differential fluid, and when I was rearranging my toolbox this past weekend I discovered it hadn't been returned. The borrower may have mistakenly returned it to the club tool table or just inadvertently put it in his own toolbox. I'd appreciate it if the borrower (whom I don't know) would look and see if he has it or let me know if he put it back with the club tools. Thanks!

Bob Schmitz

Dark green 1998 Z3 2.8 Roadster