Rusk anti-curl..or any straightener!

I saw a message a while back about how awesome Rusk's salon relaxer, Anti-Curl is. The salon I use now does not carry Rusk products. I saw an ad in a magazine that says Regis Salons have the product. I know of a salon in my city that carries Rusk products....but I've never been there. My dilemna is: My hair is highlighted (but not a touch-up for three months) and I'm growing out a short cut. How can I go for this treatment to a new salon? I don't want to give up my present stylist, and I don't want to just walk in to a new salon and tell them to take the serious wave out of my hair......?????Help!