It seems Oakley are pretty accommodating, I have Frogskins too, and although it's not an option anywhere on the website they were happy to make me clear prescription lenses in Frogskins.
@NurseHolliday started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
It seems Oakley are pretty accommodating, I have Frogskins too, and although it's not an option anywhere on the website they were happy to make me clear prescription lenses in Frogskins.