This should be of great interest. I recently read the book, "Blue Mauritius" and it mentions in the book that the printing plate has been lost. Well aparently according to the following article the elusive copper printing plate has been recovered in 2015.

http://www.davidfeldman.com/2015/03/amazing-discovery/
http://www.davidfeldman.com/the-mauritius-post-office-plate/the-movie/





www.ebid.net/us/stores/Adam-%CF%80-Stamps