I was going to say, you can probably find lots of them if you get on a plane and head Down Under, or to the Homeland....
You could probably even pay enough to put them back on the plane with you....
But seriously, I have never even seen any running around Canada. If I had a bunch of $$ burning a hole in my pocket, and absolutely had to have them.
I would start by calling, Radd Cruisers (Mud member Radd), G&S Cruisers (Mudd member 70sGuy), Crushers (mud member), Or
J Cruisers JDM Parts & Imports in BC Canada (I dont think they are Mud members)
Good luck, it would be cool to have. Although, I grew up in Suburbans, my family has been driving them since the 80's. There are 2 in the driveway as I type. (Actually, to think of it, there are 2 in every driveway of my immediate family- on two continents). My folks had ONE with Barn doors, and it was agreed that it was THE WORST set up ever. Think about what you currently do if you want to put something longer in the back. You leave one of the gates open, and it just hangs out. With Barn Doors, they have to be tied, or bungee corded, or some other silly system to keep them from swinging...
Just my $.02.
Doug