I own a glass shop and I have only found one, located in florida for 400 plus shipping. Nothing in canada or the us. This is a trend I find more and more. While companies are cutting back, more and more. back windows, vents and rear door windows are getting harder to find, even on some 10 year old cars. The more expensive the glass, the quicker it will go out of production because it costs more to stock. The second gen window has molded rubber (mine looks like crap) so it is more money to make, ships less in a crate etc. Your best bet is to search salavage yards for one, make sure they protect the defrost when removing it. The rubber is the most important thing though. sun burns them down.
Good luck, can't say I agree with your choice of glass installer. Find a local shop that the owner works in himself, they are going to do the job right. My face and my name and my families worth is on every job I do and I take great care to make sure every car is better than factory isntallation. Big shops hire whoever they can get, some good, some bad. Hate to think your hard to find window was installed by a guy who will be fired tomorrow for doing poor quality work.
Good luck. If you find one and want to make the drive, I would use you right and the job would be done correctly.
Scott