As far as I've seen most circle lens stores carry prescription lenses. Not necessarily all brands or all lenses in a particular series/color but yeah, prescription lenses are readily available nowadays. But of course, the higher your prescription, the more limited your choices will be.
I can recommend HoneyColor
, which was already mentioned above. I've ordered a lot from them and never really had any problems, as far as I can remember.
is another good choice. A fairly well-known store that I've been a long-time customer at. They have a good variety of lenses, great customer service and run sales often. What puts LensVillage above their competitors is that they have free shipping, even if you only buy one pair.
Also, feel free to use my discount code SAMURAI15
to get 15% off sitewide if you buy anything from them (incl. cosmetics and sclera lenses).