I couldn't find a file for this Vesa mount adapter for my Samsung monitors with model number: S24D390HL.
The only place i could find it was on ebay for sale, also 3d printed so i chose to design a version my self.
Hope that you can use this, even though it might not be perfect, my two monitors have been hanging on the mount for about 3 years now and they have not moved a bit from their place :)
Here's a link to the assembly i did: https://www.youtube.com/watch?v=-E4p0pSgVIE
Sorry if my english is bad tho, you'll just have to live with it haha.