there isn't really any such, you would need to identify the actual [Dupont] paint color code like
from here, then you would have to cross that to a modern paint code, then you could have a local paint supplier fill a spray bomb, a perfect match being a long shot - or you could take a gamble that what
this place would supply would match your particular 50 year old paint - or you could take a sample to a good paint supplier for computer matching
Bill