Check out Spurcycle and their bells
This started out as a Kickstarter project
I like mine and it commands attention:
Spurcycle: About Us
X2. This bell is understated and elegant on the bars but loud and crystal clear when struck. It'll hold the ring for 4-5 seconds. Only rings when you want it to. It's unaffected by bumps. If Campy made bells this would be it!