I wonder if it would help if you all compared tracking info if it would help.
Maybe all the damaged models came into the USA and Canada at the same time?
If you have got any tracking number info you may want to keep a copy as well.
It may sound a bit far fetched but I wonder if they were all fixed to a pallet that was dropped, it may explain why the windows have popped out.
I have dropped a 1:43 model in a box in the past and the roof section which was also part of the front and rear windows frame came away.
The wiper blades also came of the window, I only dropped it three foot onto a carpet, the box was fine which may help you to find a cause.
Maybe Customs or the Post service have tried to cover up the damage thinking that know one would ever find out.
