Rich.. At least you won them, if they were the ones mentioned they looked the part, ready to fit and from a seller who is a long standing eBay member, with an established reputation. Like I said, some are made of precious metal. I think you will be OK, but its always a bit of a worry when you open the box.
If you have not done already, get yourself a Nectar card and link it to your eBay and PayPal Accounts. The way you are going the points will soon add up, and you can spend the points on eBay and get a few quid off your future purchases.
Jools... As to the wear pattern, it all take place on the loaded side of the slider and bush, as in use the slider and bush are under constant sideways load. So as long as the slider doesn't rattle or knock I would be happy, and accept a little slop, taking into account the age of these parts and my pussyfoot "cloak of invisibility" riding style.*
That extra bit to get perfection is the bit that costs the most.
You could say a few minor rust pits will hold oil and improve the lubrication and have a marginal effect on damping compared to other factors.
As to re-tubing, if the spindle lugs and oilseal holder thread parts could be salvaged without damage, anything is possible. You need your own toolroom, skill and time. Paying the going rate would make Rich's look positively cheap, but when serviceable originals have all gone, the Indian or Chinese entrepreneurs will step in. They may have already done so, but I would be a bit wary of these safety critical parts made from re-cycled Oil Tankers.
In manufacture I would assume the last step would be to bore, hone or broach the final ID, to remove any distortion from welding on the mudguard mounts. The early types look to be brazed on, but even so there is always the risk of heat distortion, so I doubt if this was done to the pre- finished tube.
Any production engineers in the house?
Swarfy.
* Ride with the mind set that no other road user has seen you, and that guy up ahead is gonna pull out, turn across you, run a red light....put your own scenario. You folks, the survivors, know exactly what I mean.