After reading Carol’s Stenciled Headboards post, I was curious to see if I could find any headboard stencils, and found that that there are several available. Here are a few:
Dressler Stencils’ Twig Headboard can be used with either a queen or king sized bed.
This iron headboard from Designer Stencils is offered in twin, full, queen, or king sizes.
This photo, found on Flickr, pictures a headboard stencil from The Stencil Library [discontinued].