anybody have any advice?

I was going to use a8 or phaeton upper arms from rock auto,

or should I just replace the bushings?

Just the passenger side is bad, drivers have been done already. balljoint feels tight, just the bushings have play.

 

You could press out old and replace with new bushes if ball joint is ok.

When my lower arms were done by another shop they were a mix of A8 and GT parts. Checking online I found the same mix of parts from GT parts shops.

 

Just did my uppers, used phaeton w12 arms from rock auto, beck arnley, worked perfect ,

The original arms have audi stamp on them, a8 arms