1967 Bench seat headrests ??

Greetings all,

I'd like to ask, were headrests available on bench seats in 1967 (Darts, Barracudas, Valiants) ? I'm aware that headrests were available and somewhat rare on bucket seats in '67, I'm very interested to discover whether they were on bench seats. Thank you all for your input.

Regards,
Christopher