No I don't, but this is what I've done to make forms in various sizes out of aluminum foil
http://members.aol.com/davidpetty/mom61.htm
In steps 3 and 4, you can actually make the walls as high as you like, not just folding to the center to make forms of various base sizes and wall heights.
Flare the sides for more round effect as needed.
I've mostly used this for cornbread bowls or other quickbread forms , as bread free froms fairly well but it should work for a yeast dough too.
Phil