[bpape]

If ISO from the outside isn't an issue in your place, you could just fill the stud cavities with insulation above the kit and cover with cloth. You'll have enough thickness to make them pretty effective.

I normally don't recommend this due to the isolation issue but you may have to. 7' drywall and then a treatment thick enough to be of much good over the kit isn't going to leave much room for an overhead mic.

Bryan