Yes, Dersu Uzala is probably my favorite Kurosawa flick. Unfortunately, the film IIRC, sits in custody of Russia somewhere, since the Soviet Union funded and produced the movie (Moskfilm?). Kurosawa always had trouble funding his projects.
Kino Lorber released a non-anamorphic DVD of this film years ago, of which I own a copy. It has a terrible video transfer, but it’s the best way you can currently watch the movie. I think it’s truly unknown if Dersu Uzala will ever see restoration at all, considering who owns it. I think it’s likely as well that the original film negative has not been stored properly and has severely deteriorated.
I’m seeing dvds on Amazon and Ebay.