Can't help you with Hersonissos I'm afraid, but thought you deserved a reply. In Stalis last year Magners was widely available (maybe due to the number of Irish bars) as were other ciders like Strongbow and Woodpecker.

Hey, be careful with that stuff! Living down here on the Somerset/Wiltshire border, they have special Cider wards in the hospitals, that stuff sends you mad!

You are going to a foriegn country

try the LOCAL brews

it's much easier than complaining that there's no Strongbow

magners is everywhere in hersonissis, which as you will no doubt know is bulmers, same bottle, different name, quick tip though, make sure you see the bar staff opening the bottle in front of you, enough said, you probably get the picture. another tip - dont try a a magners + mythos snakebite, your body will not appreciate it and you will end up cleaning the remains foff your clothes for weeks.....