Cone ISO-30 for Aciera F4 milling machine

We are looking for a cone ISO-30 in which we can hold a mill, diameter around 20 mm and fix it through a M10 screw fitting the mill's threaded hole at the rear.

This is for an old Aciera F4

We have cones for bigger mills fixed by an M12 screw, but need a cone for smaller mills with M10 fixation