I don't know if there was ever a "matched" TC but I doubt it. I have the same 2X-1 as the seller is selling, I got it from a rather odd eBay buy of a Vivitar 200mm F3.5. (The seller claimed it was a K-mount which I doubted, turned out to be a Tokina-built TX-mount lens, the 2x TC, and a junky aftermarket M42-K adapter which didn't allow infinity focus. But it was cheap!)
I since picked up a Komine-built version of the Vivitar 200mm, which is what I believe the seller is selling. (Can't tell for sure without seeing the serial number. BTW, anyone who thinks the Komine-built one is heavy should see the Tokina one, it dwarfs it!) I've used that lens with the 2x teleconverter a few times, most recently at Disney World. It's can be a touch slow and prone to CA but you can get some decent results. Here's a few examples.
This one's blurry probably because of the slow shutter speed, 1/80th is pushing it for 400mm!