I rebuilt mine myself, most rebuild places give you someone else's rack and exchange yours to fix that in due course. Also, good piece of mind that all seals are replaced and not just the outer ones.

I'll see if I can dig it out, but I found the schematics online and then ordered all the seals direct from the leading UK specialist. My rack was in perfect condition fortunately when I stripped it, no scoring whatsoever.

Personally I'd recommend going down my route as the kits didn't seem to have all the seals when I looked, and you can check the condition of your rack as well.

I ordered new track rods and boots as well, reconditioned my power steering pump, fitting new power steering hoses (the price will make your eyes water) and also installed uprated front shocks for a complete front end overhaul - obviously quite a lot easier to do with the rack out the way.