Manny,
Had thought about it after making a few for some local techs
and a couple of members/friends, but the hassle marketing them would be , as Mike Freeman said, the code chart numbers
would stagger your mind.
Too many models to make it worth while.
But a nice little tool for the DIYer guy. That is why I listed it along with the schematic. Easy enough to make your own and all parts are RS - off the shelf.