Greg, Like it's been mentioned the original set up for most Contemporary's was the Jaguar Series I XKE manual rack set up. All of the parts necessary to build this set up are available at XK's Unlimited. (Kind of one stop shopping.) What you may not be able to find there, you can find at Welsh Jaguar. (
http://www.welshent.com/) If it were me, that's how I'd go. You might also check with Mickmate. He's got more info on these cars than most of us combined. He also reads this thread regularly.