I order mine from Vision Direct
, I have ordered blue and green enhancers and they are very comfortable and non expensive.
I haven't had any issues with them, just remember you have to go to your doctors and get your eye size chart from them before you can order prescribed, you probably know that though.
Edit: You will want to buy the colored lenses not the theatrical lenses, you can buy the theatrical but it will be more expensive. You can get a box of colored lenses for about 30-40 usd and for theatrical lenses it will add to about 60 usd for one pair.