Though it was always sold as a Pontiac, the Parisienne was made with mostly Chevrolet parts. The only Pontiac parts on this car were the exterior body panels. All of the engine options that were available on this car were Chevy engines, and there were a lot of them. They included the 283, 327, 350, 396, 409, and the legendary 427. The transmission options were also Chevys, and they included the Powerglide and Turbo-Hydramatic.
The Grande Parisienne was sold in the late 1960's as a personal luxury version of the Parisienne, very similar to the Grand Prix that was sold in the United States.
The Parisienne was brought to the United States in the 1980's to satisfy the consumer demand for another large Pontiac. These cars were only sold for 4 years here in the states, but many of the older models have made their way across the border.
The Parisienne that was sold in Canada is considered a classic by many car collectors. You can find them and the American version listed on eBay if you happen to check at the right time. There are also some parts for these floating around eBay. Remember that most of the Canadian parts are similar if not exactly the same as Chevy parts that were sold in the United States.