I am also a fan of plain greek yogurt, which you cannot find here to buy in supermarkets. The yogurt called Griego is NOT greek yogurt, so don't be fooled! It's just thicker slightly less sweet yogurt. I always buy San Cor brand Yogs firme natural:
http://www.sancor.co...C;PRD;189;PRD;,
It's the closest thing I have found in a reasonable price range without having to travel half-way across the city. They sell it in any supermarket, but will often run out so if you don't see it they are probably just waiting for the next shipment. I add a but of honey and fruit/nuts and it taste-wise it gives me a greek yogurt fix.