"Canadian" 1982 Collector Edition

I own a 1982 Collector Edition that I bought through a private sale in upstate NY a few years ago. The vehicle appeared to be all-original and numbers-matching condition and had been sitting under cover in a garage for a few years. The car has a kilometer speedometer and odometer, and the temperature gauges for oil and water appear to be in degrees Celsius rather than Farenheit. From what the former owner told me (and supported by the paperwork I received with the car), the car was bought by a dealer in upstate NY and sold to her father-in-law in 1984, was driven only in the summer months and garaged in the winters (which would explain the lack of any rust on the undercarriage), and driven very little by this older man. When he died, the car was given to his son, who kept it in NY and again used it only in the summer months. The son died, and his wife then inherited the car; she rarely used it, and it sat garaged but was started once or twice a month. I found out through a friend in NY that she had the car and wanted to sell it. Currently the car has 44,000 km on the odometer, and I have had the car brought mechanically up to spec by a local Chevrolet dealer and the exterior repainted in the original Silver Beige Metallic (the original paint was deteriorated in several places) with new, authentic striping and fade-out graphics. The only thing that does not work on the car is the power AM/FM/CB radio antenna, which I understand is a common problem. My question is, how can I confirm that the car was, indeed, originally a Canadian car? I understand that only 177 of the 1982 Collector Edition cars were sold in Canada, which would make this a rare vehicle, indeed.