Sorry Buckey, when I mentioned where to find it, I didn't do due dilligence and give a link..
And it was a bit tricky to find, as so many people have rearranged and relocated stuff on this site over the years, it takes a AAA roadmap to find the simple things sometimes..
Anyway, for posterity, and to keep this thread as an active source if someone else searches... like maybe next week.....

radiator cap
OEM p/n. 49085-1053
(32mm ID x 16mm deep neck)
0.9bar / 13psi
Same as 1978 Ford Fiesta
Stant: 10229 (Bryan Moody)
Carquest :33028 (Guy B. Young II)
Stant: 11227 (blister pack) (Guy B. Young II)
Stant: 10227 (boxed) (Guy B. Young II)
CST: 7013 (Bryan Moody)
Motorcraft: RS62 (Bryan Moody)
Motorcraft: RC19 (Bryan Moody)
Beck/Arnley: 133-8060 (Bryan Moody)
Beck/Arnley: 133-8078 (Bryan Moody)
Gates: 31527 (Bryan Moody)
AC-Delco: RC19 (Bryan Moody)