Presumably, this being dental equipment, it is not readily available to us mortals?
Get with the program, Stick! It's the 21st century and the internet is here!
https://thedentalmarket.net/dental/pins-posts/ note their logo says "open to the general public"
I'm sure the same kind of online source is also in UK...unless there is any truth to the British aversion to dentistry...
I agree. They're rather poorly engineered and very prone to breaking those pins off or the small hook near the bottom. Good fix that doesn't show and probably stronger than original. I like these kinds of repairs. GOOD WORK YOUNG MAN!!!! ( you're hired )
Of course you know this bizarrely engineered piece was NOT designed to be repeatedly taken off and replaced. The pot metal casting gets brittle with age, too--making the task +50 years that much more difficult.
When I did not know any better in my restoration, I managed to
completely remove, disassemble and have the main parts all replated. We did not plate the vanes as there was too great a risk of losing one in the tank or finishing. But, the rest of the assemblies were plated, reassembled and reinstalled without breaking anything. A miracle. I'd never attempt again!