My 2nd gear is crunching too. I read someplace it costs about ?120 to have it fixed. But i went today to a VW specilist and he said that its gonna be cheaper to replace the whole gearbox and im looking at a lot of money 
might be a quote for a gearbox reconditioning, be cheaper to get a refurbed one and change them over i get the same if im giving it some but only when engine temps below about 70 and the clutch is brand new so its not that
