Good day.

Since day one, I learned this was named gimbal :

file:///home/externet/Pictures/Gimbal.png

Unable to insert image 😡, can be seen at --> https://lanternnet.com/product/wp-solid-brass-gimbal-for-large-yacht-lamp/

Trying to look for a manufacturer/vendor, only get crap results for cameras. Any special term I should use instead in a search ? Do you know a provider for large ~30cm ones? Has its name changed ? Plastic would be fine.

Edited April 8Apr 8 by Externet
image does not stick :-( Perhaps another did stick...

I found these, hope it helps.

https://www.etsy.com/uk/market/ship_gimbal

eBay

Gimbal Compass | eBay

Explore a wide range of our Gimbal Compass selection. Find top brands, exclusive offers, and unbeatable prices on eBay. Shop now for fast shipping and easy returns!

I used this to search for them Gimbal compass for Large Yacht Lamp 30cm using duckduckgo to search.

or plastic ones https://www.marinecompasses.co.uk/Binnacle-Mount