They sold a DVD of Death Lullaby at Taco Che for a very limited time. I think that's the only time it's been in print. I really wish I could've gotten a hold of it. I loved Midori so much that I paid $40+ for a French DVD. I would love to see all of Harada's works.
Have you seen Death Lullaby?
You can buy it here in japanese http://taco.shop-pro.jp/?pid=15851103