1967 Barracuda Fastback rear window

I am looking for a NEW rear window for my Barracuda . In the spring I found some on the internet for $299.00 , but now since I have found the rear window rubber and support strips all I can find are rear windows for almost double the price . My Questions: Is this window that rare ? Can anyone help me with Mopar parts sources ? I live in Canada and we dont have a lot of classic car sources up here.
Any information will be appreciated.. Thanks