I have some irregular spaces that will restrict the radius of throw to 14-16 ft. However, within the same zone could space several rotors at 25-30 ft. (head to head) Suggestions for products. If sprays were used in the narrower sections it would be a limited number in that zone.
If you are looking for a smaller turf rotor, go with the PGJ from Hunter. It is a mini me version of the PGP. I have used them in small city lawn areas and they work fairly well, haven't seen anything comparable.
Rainbird and Walla Walla have come out with mini-rotor nozzles for pop-ups that are flow matched to rotors. These are very handy in the situation in which you have; install pop bodies and put these nozzles on and you can have them on the same zone as the rotors. In looking at them, I think the Walla Walla ones are much more "engineered", but either brand should be able to do the trick for you.