I began to price up a head rebuild for my old GT G40. I know your used to dealer prices but the numbers will scare you.
Rocker cover gasket - £23 when i bought one on Tuesday for my G40.
Oil Seals are about £5 each.
Headbolts - £50 a set
Tappets are in the £20 region, so again about £150
Valve Guides are £20 each
Belt is £20
Thats around the £500 mark and its not a complete list of what you need. I can knock up a full list if you want but I hope your piggy bank is full <_<
I know VW do a gasket set for about £120 but I don't know what that contains. Struggling to see what it will include for that price.
sure somebody will give you a definitive answer to your question but nothing strikes me as missing from your list.
EDIT - Most parts will need to be ordered in so bare that in mind.