As wayne said go for GSF brand name head gasket, iirc the gasket on its own should be 19quid or somthing and the bolts come to just over a tenner (at least with the mk2 16v but I cant imagine its much different). You NEED a torque wrench to tighten the head bolts IN ORDER and in stages, should be two nm values and then 180deg or somthing similair. Not much effort but it has to be done, you can borrow one for half an hour and be done with it but they are always worth having for suspension and stuff. As for the order it should come with the gasket on a bit of paper but essentially it starts from the middle and works out diagonally so would be 5,6,3,8,4,7 etc if you call 5,6 the centre working top to bottom.
