Yeah, I've checked.
I've checked 5 or 6 local glass shops, and a couple national ones. They don't make them anymore. The deep tint version was lamenated (like a windshield). The glass places do carry the clear or light tint tempered pieces though. However, they did say, if you have the slider version, your even more screwed, no glass at all anymore for those.
I even called Pilkington Classics. Pilkington makes OEM glass, and they have a special division dealing with "vintage" auto glass. They said they can make it with a similiar tint, it would be tempered. It would cost some serious $$$, many hundreds. So if I went that route, I'd have to pay for both sides and get different gaskets (the deep tint lamenated, since it is thicker glass, uses a different gasket, which I already bought new a few years ago.
I know they're not that rare, they're around. Yards come up short here in the rust belt, most only keep late-model stuff due to rust and demand.
It'll turn up soon or later........hopefully!!!