Matt - I got my last non-Rx and Rx versions both from
www.opticsplanet.com They had the best overall price/service, and I had high confidence in their ability to get the Rx right. Found out later that regardless of where ordered from, all Serengeti Rx lenses are made at the factory, period. Took about a month, I think, and I was a "happy camper" with them. Until the cataracts started shifting colors. Oh well.
Maybe after I get them removed I can go back to the Drivers lens in the Aviator frames....been my favorite for decades.