On Internet where can I buy 1/42 this album?

I think you can go to the Yahoo Auctions in Taiwan & Japan , you'll find some auctions for this album.

There're some auctions for this album in Japan
http://search.auctions.yahoo.co.jp/search?sb=desc&desc=mr.children&acc=jp&&f=0x12&at=true&alocale=0jp

There's one auction in Taiwan
http://tw.page.bid.yahoo.com/tw/auction/1109184285?aucview=search