The picture of the hydrogen fuel cell bus in the previous post was taken from a page dedicated to the spring 2005 convention of the Motor Bus Society in the San Francisco Bay Area. It is a big page with a lot of photo's of buses seen on the way and during excursions. The pic on the left shows you a trolleybus, but most are 'regular' buses.
Photo's are 700 px wide, which isn't all that big in this day and age. If you're a photo collector like me you'll probably prefer the more hi-res stuff. Still, photo quality is excellent and you might just find the brand, type or model that you were looking for. And if you're interested, the story about the convention is also worth your time.
Motor Bus Society Convention 2005