6 Solutions for Mach3 Obsolete Parallel Port Interface - rcKeith
BuildYourCNC - Mach3 USB Interface Board
High-Torque Stepper Motor, Stepper Motor, Driver, Stepper Motor kit, DC Servo Motor, DC Servo Motor kit, Stepper Motor Power Supply, CNC Router, Spindle, and other Components.
mach3 CNC USB 3 Axis Kit, 3pcs TB6600 stepper driver+ mach3 USB stepper motor controller 100 KHz+3pcs nema17 motor +power supply|stepper motor power supply| - AliExpress
USB CNC Controller or Mach3 USB Controller - RobotDigg