I agree both with the specifics and the underlying approach that aussietrev has laid out, mustang. With an aging ride-on if you plan to use it rather than restore it, you clean it up, check for wear and cracks, replace worn bits and weld cracks, lubricate everything that moves, and put it back to work. You don't need to replace things that still work properly, and in this case you can probably recover the seized tie rod end. See what you can do about lubricating all of the tie rod ends, if they are of the metal-on-metal type rather than the type with nylon seats.
If you are restoring, of course, the process is different. There you are insisting on it looking and feeling like a new one, and the sky is the limit when it comes to replacing parts.
