Not sure about Nash or his parts suppliers, but my Charvel San Dimas has a sticker on the back of the headstock stating that the headstock shape is licensed by FMIC and used with permission.
Does Fender own any of that anymore? They are a completely different company that bought the brand from the former company. I didn't think any of the patents, copyrights, intellectual properties, facilities, or inventories came along in the deal.