What about a kinetic light switch instead of a doorbell? They work with mains electricity rather than a relay, but it might be closer to your needs. If you fiddle around enough, you could find a self-compatible set of doorbell and switch where you could pair a doorbell button to a light switch unit.
Or you could use the light switch button (some are ip65, apparently) and draw a doorbell symbol on it. Some industrial units I've been to have a massive button as a doorbell at the gates.
What about a kinetic light switch instead of a doorbell? They work with mains electricity rather than a relay, but it might be closer to your needs. If you fiddle around enough, you could find a self-compatible set of doorbell and switch where you could pair a doorbell button to a light switch unit.
Or you could use the light switch button (some are ip65, apparently) and draw a doorbell symbol on it. Some industrial units I've been to have a massive button as a doorbell at the gates.