Bell that sits above trigger shifter?

I’m looking for a bell that will sit above a trigger shifter on a flat bar bike.

Placement is a safety issue: in this location I can maintain hands on bars, brakes, shifters and warn pedestrians at the same time.

I’ve tried a bell that sits next to the shifter and I have to take my hand off the bar to reach it.

Attached are photos of the old bell that broke, showing the dimensions & placement that I’m looking for. Unfortunately I’ve been unable to find a replacement that fits. The bells that I’ve found don’t have a ~1.5cm gap between the clamp and the body of the bell, and only have a couple of MM clearance.