Check Ebay. ^^ I get alot of dvd's off of there, but I know some of the sellers are rotten. -_-
But, that dvd set is not an offical release, its hong kong. Its kinda 50/50 when you get them too. Sure they are cheaper, and you cant find them in the us, but Ive had a couple that the quailty was just amazing.
^^ So if you do go with HK dvds, besure to check around at a couple review sites to see what the quailty is like. ^_^
Good luck, sorry I cant be of more help! ^_^