Heh. One of the reasons I started competing at age 62 was an interview with Gordon Santee nearly 10 years ago. He's few years older than I am and was asked what it was like to compete at his age. "My competition is injured or dead."
At any given meet I've been one of the oldest and now THE oldest guy there among a small handful of masters lifters. That's just the reality, as you said. So to get a wider group of the doddering population you need to go the powerlifting rankings site and enter your pertinent information. That is how you find the external sources of information to fire the internal drive to see if you can beat them or at least how high you can climb in the rankings. I have my work cut out for me in this respect. A guy just beat my last (and pretty lackluster) total by over 60 pounds. But given a better focus on my training and keeping me from getting the willies when I squat, I think I can better his total for 3rd place.