Yes there's tons of old guys who kick ass at this sport. Just the other day I was passed by a guy who must have been like 70, all decked out with his bike attire on his shiny Cervelo.
And I've met up with a 62 year old man who's been in hundreds of races in the last couple years, has a 37 bpm resting heart rate and could probably crush me so bad in a race that I'd implode into a black hole of shame.

And it might interest you to know that some research shows that people of any age respond to training just the same. The only difference is that maintenance gets harder as you get older ( as I understand it ).

Anyway my suggestion is that you form a search party and try to locate the El Dorado. It's somewhere out there. Forget biking, you could be rich! RICH!!!