I wondered about one of the Celestron units, but I replaced the focusser on the C925 with a Feathertouch two speed years ago and have not got the original any more.
I wondered about one of these but again I would need a standard focusser, or custom parts to fit it to the Feathertouch
https://www.astroshop.eu/motors-cont...-c9-25/p,57049
None of the options (Apart from something on the visual back, which I have not got space for in the imaging train) would eliminate image shift while focussing but without physically touching the focus knob it would probably be reduced a fair bit.