The thing is if you get your Oakleys glazed with regular prescription lenses you'll have exactly the same situation you're in now, just with better frames. Oakley optics are outstandingly good, which is why they're expensive. Anyone offering genuine Oakley RX lenses will be sending them to the same place in Ireland. I've got two pairs of Oakley RX lensed glasses, and they're the best I've ever worn, but you pay for it. I've got a pair of Ti WHY3's with Fire Iridium lenses, and a pair of WHY8's with Transitions and Emerald Iridium, and both are fantastic, but they ain't cheap!
Also, there are limited Iridium options if you go for Transitions lenses; Black, Gold and Emerald I believe.