After I've taken a better look at it, it's not stock (which is pretty obvious actually), it's taken off an old A-Class Mercedes it seems. There's a Merc logo on it and some writings, couldn't get a good angle so I took a few more pictures of it, here you go!
By the way, it's just a little squeezed between the seats when you pull it upwards, but still moves easily and feels stable. Has a few adjustable heights and quite a bit of storage inside. It's surprisingly comfortable and doesn't get in the way of the handbrake, gearshift or seatbelts (once you've already put them).
You should be able to find one at a scrapyard pretty easily, I'm not sure how it's bolted on tho, looks like you may have to drill it into the floor.
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