Don't think I've ever found it either, and it's not for lack of trying.
We've found some in very small bottles but it equates to something like $3 for 400ml (sorry 4dl) or something as equally ridiculous. Might have to wait until Austria. We've also had to settle for powdered milk at Oringen because, unlike our hard floor at WMOC, this one here doesn't have a kitchen (that we're allowed to use anyway).
We found some choc milk at one of the inconspicuous stores in the pedestrian mall, about $3.50 for 1.5L so not an outrageous price and it was in the fridge too but I decided to hold off until after the afternoon's training. Of course we stopped at the Lidl instead on the way back from the training event and they didn't have any.
Geoff was very sad about not being able to find either iced coffee or salt & vinegar crisps in Europe :(
The shop we've been buying it from seems to have run out. They didn't restock it after the shelves ran dry yesterday.
Finally found some decent stuff in Umea from a Norrland dairy. Perhaps the cows have to be north of the Arctic Circle before they start producing chocolate milk.
It's pretty cheap here in Austria. 80 Euro cents for a 500ml bottle.
There are lots of cows in Austria, but not too many chocolate trees