Please yes I’d like this but comes down to price as I’ve no idea of where to find parts to make this work
If you are able to find a dish that comes with some type of motorisation included I think that would probably be your best option.
As you have expressed a preference for a prime focus dish you are limited in your choice.
If you were to consider an offset dish then there is lots of choice and at reasonably low cost.
To get the Precision 1.2m dish I have here onto a DiSEqC motor would need some type of adapter plate making that could accept a pole clamp.
The pole clamp part could then be used to secure the setup to the rotational part of the DiSEqC motor.