I first tried this dastardly stuff at a brunch given by Swiss Romande friends (in Zurich), and was told that they got it in France.
However no sign of the stuff in super/hyper-markets around Paris; it's just seem in Eastern France.
If anyone spots this in/around Zurich, please share (off to do a search for 'Casino' in Zurich now!)

Otherwise will have to plot an excursion to Eastern France or a stop off on the way back from Paris