OEM antenna connector or wire for 64-66

[Praxiss454]

Hi folks,
I acquired this here original antenna, but I have no way to plug it in. My truck did not originally come with a radio, but a PO put one in and installed a cheapo antenna that was a solid connection to the wire.

Wondering if its possible to buy the proper antenna wire alone (e.g. not with the antenna). If not, wonder if the connector style is common enough that I could find one of my own and splice it into the existing wire.