Gunna have to go with you.... scrap yards are your best shout...
Got a long list of local tried and tested -- personally best ive found are :
BHsalvage -- LU6 2PN (01582 807709) -- i know theyve got a mk2 in at the moment with only a broken parcel shelf but they can be quite dear
Rush Green Motors SG4 7PQ (01438 354174) -- more VAGS inc 1,2,3and 4's also lupo polo and old passatts and ventos (best scrappy ive ever been to)
PJ Browns -- coming from hemel you'll know this one (opposite parmers) normally got atleast 1 mk2 in.
Hope this is of some help