Are you looking for the 9" bearing hub, or a 9" brake drum? When you say finned, that leads me to believe you are looking for a brake drum, not the bearing hub. Do you have a pic to post of what you are looking for?
I was wondering the same thing?? I have two original '69 Barracuda, 9" drums with hubs but didn't respond here because i was unsure on what the OP was looking for??? Mine have been overhauled with new lines, slave cylinders and bearings.