Maple syrup seems to be endemic for North America. Not sure about the rest of the Europe, but I don't think it can be found in shops over here in Balkans (and maple tree itself is not uncommon).
It can be found at some american chains where they serve northamerican-style pancakes, but in that case it's 99% sugar+colouring+flavouring.
As for maples, there are plenty all over the world, but the cultivar from which they make syrup is in fact northamerican, those we have in the old continent would not be good for syrup extraction AFAICT
Fascinating article.