Ahhhhhhhhhh! I see!
I have organised the AU metal gasket (of course, nice new head bolts) but is there any point to just replacing the gasket? I have always been under the impression that while the head's off you should get it reco'd (or replace it with one that already has been). Basically it's because there may be an unidentified issue with your old one so by reco-ing it you can be sure that the head you put back on is in good nick. And nobody wants to go to all that trouble and then find out they should've replaced the head after all...
AU egas head? What's the differences in that? Very curious...