A friend has a Klaxon horn and needs the plunger and spring. Any parts out there? PK
Find a junker for parts. That is a tough one to find,good luck.
I've yet to hear of a supplier of spare parts or a repair shop for hand-Klaxons. -The horns themselves come up frequently on e-bay and rather than attempting a resurrection of your friend's horn, it might be an eventual source of spare parts for an already-working horn you can find here: