Suppliers / makers of high grade metal front and rear 3rd party M caps?

[Winedemonium]

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Having recently gotten hold of two vintage lenses re-mounted to Leica M-mount, I have been so impressed with the precision made aluminium front and rear lens caps, that it got me thinking - are there makers / suppliers of these out there that forum members could share details on? 

Now, as a good boy following forum etiquette, I did search the forum first, and came across this useful thread from 2020. 

There's this thread from 2019

There's also this one, specific to the 2/35 ASPH lens shade.

 

However, what I'm looking for is of the sort of solid precision-feel quality that it is probably milled aluminium. I'll ask Skyllaney if they make their own, or have a supplier, and report back here anything I find out there. But if anyone knows where - in 2024 - to get these sort of high grade caps, I'd be grateful.

Edited March 3, 2024 by Winedemonium

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[Pyrogallol]

I have several of these Chinese ones. They are not identical to the genuine Leica ones, the metal is thicker, but they look good and fit well, tighter than very worn originals, so well that they can be airtight and one I used yesterday wanted to pop off when I pushed it on as it was so airtight.