I would like to change my Z drive from the offset belt drive to the direct drive like on the workbee. I have looked and am unable to find the mounting plate that it would require in the part store. Is this end plate available? It looks like all the other parts are available at the part store, ie: flexible coupling, spacers, screws. Like to get rid of the set screw on the stepper motor drive gear loosening problem. Never had problem with the flexible couplings coming loose.