Some folks can make you one. I am getting ready to make a 30" 12lbs at 12" draw osage longbow for my bow.

Kinda like this one
http://www.primitivearcher.com/smf/index.php/topic,6397.0.html

On primitive archer, you can ask around to see if someone can build you one. There is also a guy advertising in the classified traditional section who would build you one I bet.