I mean personally I'd refer them if they didn't suck. Yes, 20 years is a long time but I find that people generally don't change, and successful people are likely to continue being successful.

Going deeper though, obviously networking isn't going to hit every time. That's why you need a whole network and not just one or two people. If the first person you reach out to doesn't want to refer you, it's not a big deal. Just move on to the next one.