12" Kamen Rider figures

Anyone know where I'd be able to score a 12" Kick Hopper & Kamen Rider Ouja?.

I think they are 12" version of the 5" vinyls.

All of the large figures I saw while in Japan were made by Banpresto and were prizes from UFO catchers. A 12 inch figure would be 30cm range and be something along the lines of the Denou figures here. Click here for all 13 pages of all the large sofubi rider figures on Yahoo Japan Auctions.

If you want to try your luck searching elsewhere online, kick hopper is 仮面ライダー　キックホッパ, Ouja is 仮面ライダー王蛇 and 仮面ライダー　ビッグサイズソフビ is Kamen Rider big size sofubi

As far as I know there isn't a big size figure of Kick Hopper yet, and with Den-O ones already out I don't know if there will be. The last Banpresto big-size Kabuto figures I saw were Hyper Kabuto, Gatack Masked Form & Caucasus. Ouja, you might have better luck with.