I just learned that there is a limited-edition Bluray box set of the complete Columbo series, for the Japanese market. It includes the English audio tracks, though, so the only snag for most people would be navigating the menus.
Well, and coming up with the $275 plus shipping at Amazon Japan. The “plus shipping” is what makes the $375 import pricing at Amazon US not completely outrageous.
It comes in a cigar box.