Try
www.sngbarratt.com
They're a huge British supply house for all parts Jaguar related, and they have a big operation here in America in Manchester, New Hampshire. Go on the website and click on the link for USA business. Or, if you prefer you can call them at 603-622-1050. I got all the parts to rebuild my Contemporary torsion bar based Jaguar front end from them. Good luck!
Doug