A single page calendar featuring “House that Chirp Built” is up in the Cafepress storefront at http://www.cafepress.com/artbydeeling.469062614.
For those looking for a more diverse set of images, a 12-month calendar is up at Lulu.com here: http://www.lulu.com/product/calendar/deeling-c-gregory-2012-calendar/18745301