I would try Ebay if I were you. Thats where I got my copy. However, my copy ended up being fansubs. I didn't know that until I got it but it still turned out pretty good. I forgot the name of their website where you can buy their sub. But if you want the real one still try Ebay. I think I saw some DVDs there. Try typing in Live Action Sailor Moon and see what you get! Hope that helps! Just a warning though, its somewhat pricey. I got mine (+the shipping) for $30 bucks even. I'm not sure on the prices of the official ones but if your a fan like I am, its all worth it!!!
"Trace this *beep* - Sanzo (from Saiyuki)