Well, I finally bought a pair. I tried on probably 100 different sunglasses over the last month or two. Basically anywhere I went that carried sunglasses, I spent 10 minutes trying them all on.
The backup plan was to go buy that pair of Arnette sunglasses if I couldn't find anything else, but I just hadn't had a chance to go downtown yet when I found a pair of cheapo Foster Grant sunglasses that fit just as well for $12.99.
I couldn't find the exact pair online, but they basically look like this:
The red is a little sportier than I was looking for, but they fit just as well as the $130-$150 Smith and Arnette glasses I found.
Since I saved over $100, I'm going to treat myself to these ($85)