give these
guys a bell say Tabs of UKMIVS sent you. they can supply a cam for £250 delivered (normally £280 plus postage) it apparently comes from the same factory as the vw cams
the cam from the dealers is around £400
the bear minium you need to change is
followers x 8 (dealers £22 each)
Shell bearings x 10 (£6 each)
cam shaft seal x 1 (£18)
oil x 1 (£24)
oil filter x 1 (£6)
you will more than likely need the cambelt done again (unless it was done not long ago) also the water pump
expect around £300+ labour
mine went
last month cost me £850 and I never changed the cambelt or water pump as they weren't done long ago