Clonking, front end turning right...

[Ben]

Is there anything else I should replace when I do the near-side driveshaft this weekend coming?

Haynes says this-

"Slacken and remove the three nuts
securing the balljoint to the lower suspension
arm, then withdraw the bolts and free the
balljoint from the arm. Discard the nuts - new
ones must be used on refitting."

Where can I get these nuts?

I never undo those unless I'm replacing the ball joint. I remove the ball joint from the hub and leave it on the wishbone.
If you are replacing the ball joint though the nuts and bolts usually come with the new one.