Hi Guys,
Long story short, I bought a second hand kit a while back with promise everything was fine, well it wasn't.

I have one front damper that is leaking, and both back ones have lost pressure and don't return.

Car this kit is for is Audi A4 B7 Quattro.

Now, the rears are not too much of an issue as I know I can just use other dampers (e.g Koni)

But what can I do about the fronts? I have just replaced both bags as they looked worse for wear so rather reluctant to buy replacement front struts complete at 850+

Does anybody know if the dampers can be rebuilt/replaced independent of the strut? If so what specs?

Thanks in advance.