Think it is a slightly different shape (corner arch?), nothing a sheet metal nibbler wouldn't fix I imagine.

 

Take a tape measure with you, and if you can, take some cardboard and cut out the shape of the window for one of the sides to see how much different it is. A while back I sold the back window section of a cab (cut out) from a 86 xtra cab because the buyer said it's the tallest Toyota rear window. If your 84 is an xtra cab, likely it won't be tall enough going off that guy's comment (seems true). Standard cabs had a shorter window height atleast for the 86-87 trucks I've had. I think the same story is true for the 89-95 pickups, extended cabs have taller rear windows than reg cabs. As long as the shape is close, likely you can make it work, might be better to post a wanted ad on craigslist.

If you're in the Michigan area, I have like 5 windows for you to pick from (reg + xtra, almost all sliders) lol.

 

 

Shipping across the boarder is probably killer since it's so oversized. Shipping to a US address would still be a bit expensive, I'd expect around $50-80. I kind of hate shipping large windows in the mail though, packages go though a war while in the transport system. The rear window from an 84-88 reg cab should be an exact match for your truck.

Kind of funny, one of the only solid glass rear windows I've had I sold because they are so hard to find, nearly all of them down here are sliders except the most base of base trucks with basically no upgrades (no ac, no chrome, etc).

I wonder how much different a reg cab 89-95 pickup would be vs yours. Angles might be a little different, but if the overall height is about right, you could always seal up the corners if needed or slightly modify the hole. I should prob measure up a 86/87 standard cab window to compare with a 89-95 window.

Depending on your skill set and willingness, it's possible to cut the window metal out of the 92 cab and weld it into the 84 for a perfect fit. Down side is the body work will be a lot of effort to make it look nice. I assume finding the right window should be easier than the work required to do that though. I have sold the rear cab metal around the window though to one guy though.

EDIT: Here's some quick photos I took. The reg cab is MUCH shorter. The 89-95 reg cab I have is way out back in the woods, so didn't grab a pic of it.