Changing the rear quarters on my Dart conv. from a 69 to a 70

The Canadian market had a few things a bit different than we did in the States.
Didn't you guys get a GT model in 1970 and 71?
I've never seen a Dart convertible past the 1969 model in the States. It is my understanding that none were built for the US market.
1969 was the last year for a factory convertible Dart, the 1970 or later versions are custom builds based on 68 or 69 cars usually.