Try Ford Cortina MK3/4/5Manual Steering Rack. KELLY BRAY STEERING RACKS in the UK is a good source with quick ship to the us. http://www.kellybraysteering.co.uk/
While you're at it you may want to see if there is any wobble in the steering rack bushings. You can order them as well.
Thanks for the info Pat. I'll look into the steering boot. The car was never finish. Just received the car last Saturday night. Haven't had much time to work on the car.