Sorry, what's this "wheel" you're asking about? Is it like an old code wheel from computer games?
The '76 edition (pictured above) had little die-cut holes in the cover, behind which was a wheel that you'd spin and get all sorts of information about various episodes.
For instance, if you turned the wheel to "Tomorrow Is Yesterday", you'd find out that the stardate was 3112.2, the abbreviation used in the cross referencing throughout the book is to indicate this episode is TY, and that the summary of the episode is on page 46. Click on the picture above, make sure it's enlarged to full size, and you can see how this works quite clearly.
Like I said, because of all the additional references that would have to be included, it's very doubtful there'll be another wheel. Sorry, kids.