Mk1 Cortina steering box wanted

G'day all,
Looking for a Mk1 Cortina steering box and column to suit 65/66 airflow (theres a difference in column length between early and late cars I'm lead to believe)
Whilst pulling mine apart I've realised I have a Mk2 unit with no mount for the handbrake relay and a longer link arm.
Any help appreciated. Cheers Drew.