Looking for a birdhouse plan?

I found a birdhouse I like on ebay; http://cgi.ebay.com/Primitive-Clapboard-Birdhouse-Country-home-decor-/200471580593?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item2ead098fb1 I like the style of it but I want to make it myself, I want it to be bigger and I have some wood laying around, but I need the "blueprints"