I just bought one at
http://www.april1930s.com/html/parts___manuals.html. Nice people, speedy service. They will also rewire your old foot pedal, keeping the Bakelite plug and foot controller, but giving you new wiring and extra long cord. They sell all things FW and everything I have bought has been great. They also have a large thread spool holder that attaches in the oiling hole on top of the FW so you can use large thread spools and keep the right tension.