Where to get such images?

[dawid17]

Where to get images like this

[FallenDakai]

Shutterstock or Pexels.

[defaulto]

Technically by making them yourself. :s

[dawid17]

Nope, because I've seen this image being used couple of times on different sites but in different colours. I know this is some free vector site, but I can't find it.

[Poonce]

Nope, because I've seen this image being used couple of times on different sites but in different colours. I know this is some free vector site, but I can't find it.

You can easily find it on Google Images like this

[defaulto]

Nope, because I've seen this image being used couple of times on different sites but in different colours. I know this is some free vector site, but I can't find it.

As I said. It's always better to make your own stuff. I don't know how you did answered with a "Nope" to my legit answer.
If you want to use that Image you will need to name the author of it always when you use it. Getting it is free. But not following their rules might follow up to a sue.