Looks like I'll stay with the original tie rod and pitman arm ends. After removing the pitman arm and seeing what shape the round pins and all other components are in, I'm thinking a disassembly and a good cleaning and greasing is all that's needed.
I've got a bit to go before I'll have everything apart and clean, but so far it's looking encouraging. The end caps I've uncrewed come off with almost no effort (once the carter key pulled of course) and there been no obvious wear.
If the senior tie rod ends do work out, I'll do as Dusty53 suggested earlier and change the wheel weights to the thin flat adhesive type.
