John,
Firstly, I'm assuming it was you who asked me the same question on ebay?. If not I need to get back to another John looking for steering rack info!!
My rack was a new rack from Quinton Hazell Automotive, part no ESK09. I can't remember why I was looking, but I do remember that you used to be able to go on to their web site and see it, and buy it I guess.
QH are now part of the Klarius Group and their web site (
www.qh.com) is no longer as transparent but if you give them a ring I'm sure they'll be able to help.
Regards.