Just about any of the inexpensive eBay CNC routers with a 2.2KW spindle would work for this.
An alternative would be to install a CNC kit on your mini mill, depending on the model, there might be an off-the-shelf kit that would bolt on.
A more robust and versatile solution might be to buy an inexpensive used CNC milling machine. It just depends on your budget and willingness to do a project.