Emgo has a pretty good selection, and they are not too expensive either. Can be hard to figure out how they looks sometimes though as they usually just show a "stock photo" in listings. search emgo ape hangers on google and them shop around a little I thnk I ended up on amazon for the cheapest mine are like 17" or 18" rise
:thumbsup: EvilEd shared a great tip with me about using a center punch to make some divits around bar where the clamps will grab. I know mine didn't come with any serrations and the clamps that my particular bike use are pretty skinny and dont grab as well as I would have liked them to, not a great combination with a really tall bar at least. Already a sketchy ride with them (my bike is pretty small), thinking about them folding back while riding just adds paranoia while riding 
hmy:
hmy: