No stitch regulators for any except the Berninas to my knowledge. The Viking and Pfaff have the fabric-mover with stitch regulator but it is awkward to use - or at least that is what a friend who has the Viking Diamond and the fabric-mover said.
Now if you go with a quilting frame, there are several systems that have some sort of stitch regulator.
Good luck in your search. I love searching and exploring for a new machine!