As an optician I can say this, go find a nice quality ophthalmic frame that has sufficient wrap around to it if you can't find what you like in the 'sports' section. They don't necessarily have to be 'sports' frames. I have a really narrow face so Tifosi, Oakley, Bolle, Maui Jims none of them will fit my face. I scope out a wrapped sunglass styles I like and fit me then have the lab grind the lenses. Usually places like Lenscrafters can tell you right then and there if it will work or not. Don't get frustrated though it's not an exact science because it all depends on how flat or curvy your prescription is. Let them tell you if something will work or not they should be able to tell you this just by looking at the frame measurements.

As out of character this is for me, I ended up by a pair of Chanel sunglasses for riding and putting my RX into them and they have been wonderful. I'm really not the 'Chanel Type' but they fit and I rocked them anyways.

It takes some time to find the right pair, at least it's winter and we have some time to figure it out before warm springy riding weather again I would suggest some private optometry practices that have an optical dispensary as a good place to start. They tend to be a bit easier to work with for 'out of the norm' kinds of things too. You don't have to get your RX from any particular doctor either as long as it is current you can take it to whoever you want. BTW just in case some of you don't know Lenscrafters does give a pretty hefty discount for AAA members (30%). It usually saves at least hundred bucks.