No Pentastar emblem on my Valiant!!!
I got mine at a Pick-Ur-Part in Hayward, California about 8 years ago...
Just lifted one off an old Dart... They're plentiful on old MoPars IF you can find any old MoPars in junkyards, nowdays.
I don't know who sells them, but I'd bet that somebody is re-popping them now.
Good luck!!!