Andre Radvanyi (SP?) used to hoard a lot of old RF stuff and does rebuild subs. He used to live in the Bronx but now is out in the burbs I think. He may have old parts.There is a guy on Facebook that refurbishes old RF subwoofers. He does an excellent job and brings them back better then when they left the factory. I can't think of his name but iirc @hispls might have his name or website.