Can't you get kaolin and morphine any more then?
OT, but it seems Kaolin is only available on prescription.
Next time you are near St Austell, you can pick up a good few kg for nowt. It's the clay weathering product of the feldspar mineral in granite - it's an alumino-silicate compound. Loads of it goes into cosmetics, pharmaceuticals, pottery (aka China Clay), paint, etc. You could eat it without harm, although I wouldn't!