GSF will sort you out, find your local one and pick em up, about 20 with vat iirc. U need vr6 ones as they can take the beating a lowered car will give much better than gti ones. Stay away from generic gti/gl/16v/vr6 ads on ebay. they all fit each other but any thing other than vr6 ones on a vr6 die quickly due to the weight of the engine. plus the quality of the ebay ones is v poor, unless are stated vag ones.
I wouldn't use the mk2 ones, its not worth the hassle.