I had a chance to try one of these on today at an Oakley store. Very comfortable. Much more comfortable than the Shocktube, and it does seem just slightly smaller, which I like. This will probably become my daily work glasses. I have a Prizm grey one on the way from @Chattabox23
I checked that the SI site and Oakley and couldn’t find them. There were a few pairs, frames only, on the eBay last week, asking in the 50 bucks range. But, without a source for lenses not much you could do with them. I did see a video on changing lens, and it appears they have an odd tab, so being compatible with any other model seems improbable.