Here in my part of Canada, we are fortunate to have access to Rick Scott, parts dept manager at Brantford Nissan (Brantford, Ontario is a small city located about 60 miles west of Toronto). Rick is a long-time Z owner, restorer and enthusiast who knows the cars, the parts, the company, and the customers. He and the dealership make their lot and service area available for a Z-parts swap meet once a year.
By contrast, my local Nissan dealership couldn't care less.