Hi Michael, I'm aware of the Challenger and the Titan. However, unlike their larger counterparts, they are not as nicely scaled. The Challenger and Titan are much wider than scale. You can easily notice when you sit it beside a larger one, or one of the Apaches.
Back in the day I remember one of my friends had a .21 hull that looked narrow and to scale. But I can't seem to find one anywhere online. I don't remember whether it had a beak like the fountain, but it was definitely narrow.
Oh, by the way! I recognize your avatar. That's a garita!