The Superbit is also OOP if I remember correctly, but you can still pick up a copy here and there. I got one from a third party seller via Amazon. It doesn't come with any of the extras that appear on the other Director's Cut DVD (other than a wider range of possible subtitle languages) but it's not like that one's chock full of bonus goodies either.
https://www.amazon.com/gp/product/B0...ss_T15_product
What I'd really like to see is some kind of special anniversary edition with mo' better extras, since every available version on DVD seems woefully lacking in that department. Surely if that happens it'll come out on both DVD and Blu-ray.
Oh and BTW this is my first post here, although I've been lurking for a bit. New to the game and the site and really enjoying all the info, etc., that is available here so thanks to everyone who creates/maintains/participates!
Frau Kaleun