1-Elite Ciussi stainless on bikes with elegant lines.
2-Elite Ciussi colors on bikes that can handle them.
That's it for steel bikes.
Yes, I polish the brass part of the button, and touch up the silver.

Otherwise, Campmor makes a Ciussi knockoff for $6
After that, REI has 'em, often on sale.
I've used Minoura Dura Cages in a pinch.
Not a big fan of thick "wiring" on a cage.

For modern bikes, Blackburn Amber, if you can find them affordably.
For $45 a cage, I'll stop at convenience stores and drink.