I have a pair of X-Metal XX frames that I want to get prescription lenses for - went to a local LensCrafters to get a ballpark quote. They gave me a quote of $370 just for the lenses. (It's a very mild single lenses prescription, and I wanted black iridium polarized Oakley lenses.) So, does that sound about right? Seem a bit high to me... Anyone here have any experience with prescription lenses on X-Metal XX frames? Thanks in advance!