Unfortunately, as @tokra mentions, their are potential copyright implications with a commercial release, so I'm going to steer clear. [I know this has happened on the Coleceovision, Intellivision and Atari 2600 scene, but I'm not sure how they get away with it.]
On the other hand, if another forum member decided to release PDF artwork for the cassette inlay and label however, that would be out of my control.

A a single .prg file, the game can easily be written to tape.