Many of you probably had seen this image.
It was originally made by a Game Store owner to determine how customers quickly pick up a product when it shelved in various positions.
Whenever this image appears it nearly always gathers a positive response with more than a few going "How I wish this game existed." Since the release of the Traveller SRD for Mongoose Traveller more than a few people tried.
While there may be others, Doc Grognard over on Crawdads and Dragons seems to be the furthest along. He has a beta version of the rules available here and still working on the "Book 3" portion of the game.