Found - WANTED - Transmitter cap for French 'Marty' handset

[tubaman]

Looking for a transmitter cap (and transmitter if available) for this handset for my French 'Marty' phone.
The handset is made by "Association des Cuvrs en Instrts de Precision" and the transmitter is approx 62mm diameter with a 3 point fixing.
I believe what I need is as per the last photo, but others may fit.
The phone body is actually marked "P.Jacquesson" so this likely not the original handset.

I've now added a photo of what the original handset was probably like, so if you have one of those that would be even better!