Hey,
Thought I would put a recommendation up for Randy@Stangersite for any steering parts people need. I bought some for myself and Mike68 and kits got here in good time and a very complete with really detailed instructions with more detail than the Ford service manuals. Control valve kits also include the aluminium hose seats which need to be replaced to prevent leaks. He even absorbed extra postage when I doubled up the order from the original quote.
My parts were in pretty good nick before but after a rebuild of the box and control valve the steering is amazing. I set everything up real tight ( i.e tightest end of factory specs for box using correct dial gauge torque wrench method) and its even better than it was before.