http://www.heavyglare.com/
About 4 mos ago, Bill got Rudy Projects with Rx. One eye has a very high correction power plus an astigmatism. He talked to company after company. Heavy Glare was the only place that would even attempt to work with his prescription. He's very happy with the results.
He did not want an insert due to the field of vision plus one more place to trap dust, fog, sweat, whatever. Generally, increasing the layers of lens reduces optical quality.
Frends know gud humors when dey is hear it. ~ Da Crockydiles of ZZE.