sorry, but I do notI am working from memory, and it was several years ago
I believe that I saw it on these forums, so you might be able to locate it via some searches
but I think that it was a one-of-a-kind personal sort of thing
not something that was made in quantity and offered for sale
if you want something similar, I suspect that you will have to do the legwork yourself
1. acquire a MM coin
2. acquire a tracking code
3. go to a jeweler (or other such service provider), and have the code engraved on the coin
with this technique, at least you get to choose a MM coin design that you like
Yeah I have thought of that!. I may try to make my own coin or something soon. Thanks for all your help friends!