PCA is not tiny. Reaching out to the national organization is exactly what you should do. I'm also guessing that the local chapter doesn't want to piss off the only dealer in town because they'd lose a major partner for discounts and events.
More than anything I'm not sure what you expect any of us to do. This is a forum for cars that haven't been produced in 13 years. Most of us never see a dealership. Id hardly call this corruption though.
The Boxster is still in production. Only the 986 is no longer in production.