You can try reaching out to forum member Cranbrook2 who calls himself an Extreme Bird House Maker - for good reason. He makes some incredible bird houses.
http://www.woodworkingtalk.com/f13/extreme-birdhouses-18439/
He has not been on the site since the end of Sept.
http://www.woodworkingtalk.com/f13/extreme-birdhouses-18439/
He has not been on the site since the end of Sept.