Good question, I don't know if mk6 springs will fit a mk4. If you want to risk $85 want to post a follow up? The spring perches and rubbing against something is where you'd want to look.
But all new springs will be helpful since old used springs will be sagging quite a bit by now. I've heard bilstein HD spring perches are slightly higher in the front which raises the car slightly.
New upper front strut mounts will also help a lot.
There are suspension lift kits that work like spring spacers although I don't like changing the geometry that much and they preload the springs...in that case might as well reuse old springs.