http://store.apple.com/0120-APPLE-1/WebObjects/japanstore.woa/80202/wo/RjjukTFEgppD2gOOXzBdU0CWgVB/1.SLID?nclm=AccHardDrives&mco=284C3556
Apple Drive Module - 74GB Serial ATA 
￥45,990

ｱﾎﾟｵｰｽﾄｱで内蔵HDD買おうと思ったんだけどヽ(´ー｀)ノ高いねえ