jeebus @ mmw
+1y
get ahold of chris at unusual fabrication, i think his name on this site is Unusual Fabrication , but i cant be for sure...
To be honest, most machine shops will make them for you, try contacting a local cnc shop, to see what they will quote you if your looking to get a bunch of them.
In the past, ive allways just made my own, but ive allways had the privladge of working at a machine shop, cnc or manual. I still have the detailed drawings of the taper angles and everything for these ones below, if you need them.