I just wanted to correct myself cause its been driving me nuts all night. Don Bluth did not produce, nor work on, An American Tail 2: Fivel Goes West. I wound up going home after work to watch it. This was the first time I've seen it in years, and after just a few seconds into the film, I could tell from the animation style it wasn't him. Sorry for the incorrect info!
Also, one Tiny Toy Stories. I believe this video is out of print. I have a copy in my collection. It's pretty tough to find, but well worth it. It came out shortly before Toy Story was released on video. It wasn't a promo for Toy Story, but rather Disney capitalizing on the popularity of the movie. (go figure, Disney trying to squeeze every last nickel out of something.)