There is a guy Phil Hutty on the hamb I have goggled his web site before. Type in goggle--- spun by hutty. I believe he's in New Zealand.
I pass a place called spun products everyday coming to work. They're in long beach Posted using the Full Custom H.A.M.B. App!
I'm no spinner, by any means, but it seems that spinning something, like you describe, would be very difficult. I'm not sure you can spin something to a sharp point
Size and shape sounds like a dummy spot. What are you making with the cone? Sometimes you can source a raw shape from an off topic subject matter.
Last time my wife drug me to Target I saw some polished stainless canisters in the houswares department that looked like they could be car parts. They might have been for shaking a martini, or maybe for holding Q-tips, I dunno. To me they looked like gauge cups, or bullets for a grille in a custom.