Having read the other thread, I don't get Walter's point of view (NB: I'm not say that it's wrong or anything, just that I don't understand it).
If - for whatever reason - there aren't vintage specific events, then pragmatisim suggests that riding in your own class in modern events is the only solution.
When you're a small sub-group of an already limited interest past-time, I don't understand why/how you could be choosey about events. Yes, we'd all love it if we could race vintage-specific meetings every second weekend, but it's never going to happen in a country as big and sparsely populated as this one.
Maybe my perspective is skewed because I've only discovered racing in the last 18 months, and still have that naive enthusiasm that only newbies can have, but I'd be happy to race my pre-70 bike on a modern track, provided I was racing against other short-travel bikes... Definitely a better option than sitting at home!
As the saying goes: Don't let the perfect be the enemy of the good.