Having got some wilwod calipers off good old ebay my mate has said that i may need new brake lines. Does anyone know:

a. Will the old braided lines fit
b. If they won't fit where can I get some from?

Oh its for a mk4 rs cabriolet.

 

they should fit, but if not, you could probably need an adaptor or something.
failing that find a hydraulics place locally and they can custom make lines.