I'm one of the pilots at Vintage Wings of Canada, and you can share a flight in any airplane with 2 seats.
But you're not actually buying a ride. You're sharing a flight.
It's not just a semantic distinction. I haul people in an airliner for a living, and the warbird rides are really quite different. We really want to gain you as a supporter and enthusiast, and consider you a sponsor for the flight in the short term, and a potential sponsor for the airplane and the Foundation in the long term.
We want to bring alive what it was like, and share it with people. Share costs and share the experience. (It's sure not an enterprise designed for making a profit!) Share the History.
There is nothing, absolutely nothing, like flying in an actual combat veteran. Books and simulators don't even remotely compare.
This fellow was blown away -- could hardly speak at the end of the flight. Here he's flying the Kittyhawk, checking out the airplane's roll-rate. (I had told him, "This thing rolls faster than a Spitfire or a Mustang -- here, try it! You have control."
History coming alive.

It's the only dual-control fighter in Canada. Sharing a flight is expensive, but that's part of the message we need to get across too.
Dave