Inside my Blu-ray of Little Shop of Horrors was a letter from Frank Oz so, naturally, I decided to take a picture of it for you. Try not to read it in "one of his voices" if you can. And be wary of spoilers - it's about the end of the movie.
The region-free Blu-ray is pretty cheap right now at $17.99. It's also a bloody well mastered disc and the director's cut ending is superb.