Where can I get the ONLY "docker engine" for Windows?

I only need to run my Windows containers, and I don’t the GUI or LCOW or others.
But the Docker for Windows always asks for the Hyper-V feature, which is not available on my machine.
And I think Windows containers don’t need to run on Hyper-V.
So where can I get the docker engine for windows rather than the whole Docker for Windows?
Tried Docker Toolbox but it can’t run Windows containers.