Hmmm … via Langues et Cultures de l’Antiquité : Actualités & références classiques comes notice of this Scribd site which appears o have a pile of Asterix comics in Greek (not sure if it’s Classical or not) … here’s the first one, more on the sidebar after the jump:
Η Οδύσσεια του Αστερίξ
rogueclassicism 
This is modern Greek….if you search a bit you can find Asterix comics in the Pontiac dialect which is a bit closer to classical Greek.