This company from England says they can completely rebuild the steering boxes in our cars:
Their previous email message is copied below:
The parts for these MARLES steering boxes have not been readily available until recently and we are now able to offer a complete rebuild service with collection and delivery via the TNT courier network.
I wonder if your members would be interested in the steering box details which can be found on our website http://www.marlessteeringbox.com?
I look forward to hearing from you,
Yours sincerely
David Cornwallis
Hamnish Court
Leominster HR6 0QW
England
Tel: 0044 1568 760243 Fax: 0044 1568 760465