It has been suggested by others on this forum that the internals may be Ford Escort Mk 3 or 4 spec items. I have not had the chance to confirm this yet but it could be a place to start looking Rog. A complete Escort rack is from available from about £50. Very interested in any findings you may have, I will be doing the same soon! Is the worn track rod end the problem causing the rack clunk that many of us have?