Set support material height?

We print a lot of ordnance training aids at work and right now I have a question with a 60mm mortar. Due to the fin design on this mortar, I need support material for the first 2" of the print then the rest is good. I have my support set to touching buildplate and at 60 degree overhangs but the print is adding all the way to the top of the round which is not needed and is under the 60 degree requirement. Is there a way to set the support material to stop at a certain layer height?
Taz 6 using the newest version of Cura.