Here is the diagram i built my machine from, Ploter CNC / Drukarka - gotowy projekt - REPRAPOWO - Forum Techniczne poświęcone budowie drukarek 3D
google ardunio uno with shield diagram, that will be plenty for your nema 17 motors,
the part you will need a power supply, arduino uno, shield board, and Pololu A4988 driver module.
forum.hobbycomponents.com - View topic - CNC V3.0 Arduino Compatible Shield (HCARDU0086)
that way all you parts will be locally available, you can set it up and run it a bit harder if need.