I beleive that all the Vitamin stores and food stores have very refined oils. If you go to an Indian store they have all kinds of oils with very low price compared to vitamin stores. I bought some coconut, almond and sesame oil from an Indian store in New York. Awesome prices and tastes different too.
I will try to OP with Flaxseed oil. I love coconut oil for OPing, my first few times it was a very euphoric experience.