Need a little more information. Is it advance only or does it also have the retard built in? Dist number probably would help. Ebay shows quite a listing but you would need to have your correct part number to know what you were getting. NAPA, Autozone, O'Reilly, or any of the other big name parts stores probably can still get it for you. Also most Ford advances you could adjust the number of degrees they move with an allen wrench going inside the nipple to access the adjust point. So you probably could use one off a different dist if you can not find the exact one and still make it work. If yours is still working I am not sure I would worry to much about it until it fails.