I have available a HSM35 Stepper motor (PAF-SI-HSM35) which is surplus to my needs. The HSM35 stepper motor can be fitted to Feather Touch focusers to support automatic motorised focusing. To be sure that this stepper motor is suitable for your configuration, I recommend further research via
this link here on the Starlight Instruments web site.
Asking $400 plus postage costs.
Clear skies,
Rodney