This is not actually a question but a response to many questions related to securing something to wall and ceilings.
I am coming from this discussion Mounting a bracket to an asbestos sheet eave

Where I suggested the above but could not (for some time now) remember the name and where I got them from and... I only have four left! Decided to start searching again and not give up because they have a proprietary name and difficult to identify.

Macsim ANKA Plugs and I used to get them from Caribbean Gardens in Scoresby which closed during COVID.
They came in unmarked plastic packets and that's why I had no info about.
I searched Bunnies with keyword 'Macism' and found this:

Maybe they have the plugs?
Now when I search Google with the correct name 'anka wall plug' there are good results'
Anyway... over the years they have been by fav and suggesting they are very handy to have in your DIY kit.
Cheers