berghia nudibranch is for you if peppermints don't work. SaltyUnderground sells them for a decent price. right when you get them though, put up an ad for berghias for trade/ give away because they ONLY eat aiptasia. ONce it is gone, they will starve, and that is why you should be ready to give them to a friend with the problem, just keep moving them around the NY area.
My question is then, does anyone has any berghias to share? As I understand that they are expensive to get, I'm willing to compensate you a bit.
I had good luck with an Auriga - nice fish, didn't bother my clams or corals and went nuts on my Aiptasia FWIW. Good luck.
Jw, do those guys deal with Majano to?