Interesting that both "Visit to a Small Planet" and "Don't Give Up the Ship" are available to stream from Amazon Prime in pristine prints. I'd much rather own them on disc, though.
I've been waiting for 'Visit to a Small Planet' and 'Don't Give up the Ship' since forever. I checked on Amazon UK, and Small Planet seems to be out of print. I'm not sure the other has ever been on home video.