Update: I finally found one that fits.

I was browsing at a LBS at lunch today. I always try on helmets when I am in a shop, in hopes of finding the right fit. The shop had a Triton in stock, and it fits great! It was an amazing experience. I guarantee I have tried over 30 helmets, including three extended size models that I had to return in the mail. Finding a well-fitting helmet kind of blew me away. I didn't stop smiling for over an hour.

It has a more than adequate band size, long enough straps, and rests low enough to make me look less like an alien . It looks as good as any $60-$80 road helmet with the visor removed, and doesn't look like a $20 wal-mart job.

Highly recommended!!!!!!

Edited to add pics, to compare with the above images of my giro. Looks a lot less wierd when your helmet fits