I tired to post and say there already is one, but got that stupid error about the filename already used, then got stuck in and endless loop that said I already posted, even though it didn't let me post.
Anyway, I think you mean you want the tool # and diameter of the D word in the G41/G42 line? I don't think there are DRo's for those. As long as you use the current tool's diameter for comp, it should be displayed correctly on the main screen.