Key blanks

Is there a vendor that sells correct ignition and trunk key blanks that are guaranteed to fit? Looking for Mopar '60s blanks.
Thanks

what year specifically? there are at least 4 versions that cover the '60s

Do you mean keys that "fit" into the cylinder, or
ones that will operate it?

Blanks are usually all the same, it's how they are cut that matters

67 B-body specifically

the original 1967 blanks are Y-152 for the ignition/door & Y-138 for the trunk/glove box

Jessers Classic Keys

https://www.ebay.com/str/jessersclassickeys