Doug, I wish that I could say that it's commercially available but, I got mine at a small camera shop in Germany, several years ago and have never run across another like it since. A good machinist could make the bottom T-Mount base that obviously bayonets on to the M top section. Every once in awhile, I see the proper M section advertised on KEH's website under Visoflex close-up attachments. The Leica part is actually a spacer for use on early 35 & 50mm lenses for closer focussing. Look at my pics of the adapter at the following link to the DLUGGERS Yahoo site & let me know your thoughts. While typing this, I had another brainstorm. There is a Leica adapter to put R lenses on M bodies. If you put this on the M-to-T-mount adapter & put a Nikon, or Pentax mount on it, I wonder if all would focus correctly??? Hmmmm. I may have to make this set-up and report on it. I have an LX body, which should suffice. I'll see what I can do about this and report my findings to all. http://groups.yahoo.com/group/DLUGers/files/ Art