It's fashioned after the iconic building designed by Eero Saarinen -- and made to order by Paul Coffaro in his Mid-CenturyModernWoodshop in Nevada City, CA. I first came across his site in an article in the NY Times about designers' favorite furniture. It featured a mid-century modern birdhouse by Paul - in the style of one of Frank Lloyd Wright's Usonian houses.
Coffaro's site also offers this terrific solar-powered water feature inspired by the Stahl House in Hollywood Hills by Julius Shulman. It's made to order from redwood and cedar -- a great gift for any dedicated gardener.
You'll find many other outdoor items on the ModernWoodshop site -- planters, benches, privacy screens, chairs and much more. But I know many people who would covet one of those Dulles birdfeeders.