Pololu - Steel L-Bracket for NEMA 23 Stepper Motors

This coated steel bracket lets you securely mount typical NEMA 23-size stepper motors to your project. The bracket features two slots for various mounting solutions and includes four M4×16mm screws, washers, and nuts for securing the motor to the bracket.

Pololu Universal Aluminium Mounting Hub for 5mm Shafts - M3 Holes (2-Pack)

NEMA 14 - Steel L-type Step Motor Mount Botland - Robotic Shop

NEMA 23 Motor Right Angle Mounting Bracket

Nema 11 Bracket for Stepper Motor and Geared Stepper Motor Alloy Steel Bracket - ST-M3

Stepper Motor Bracket, NEMA17 - Micro Robotics

Nema23 Stepper Motor L Bracket - NKX Motor

This NEMA 17-size hybrid bipolar stepping motor has an integrated 18 cm (7″) threaded rod as its output shaft, turning it into a linear actuator

Stepper Motor with 18cm Lead Screw: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase

Stepper Motors and Theremino Master

2266 - Pololu Stamped Aluminum L-Bracket for NEMA 17 Stepper Motors , from Pololu for €3.93