http://www.toysnjoys.com/kamenriderdeno.htmlThis is the only site I've been able to find any of them, but they're expensive as all hell.
Personally? With New Den-O getting a Figuarts, I'm waiting for Den-O Figuarts. Why? Because New Den-O uses the exact same body as Den-O, and the chest and shoulder armor aren't molded into the figure, they're glued over a generic 'body'. And since they're whoring the Kabuto body for all it's worth, exclusive or no, they'd be idiots to let the New Den-O body go to waste. I'd be surprised if they didn't release all of the Den-O forms as Figuarts by some point next year.