Black Patina Problem

Everyone (understandably) has been screaming over the current unavailability of black patina. According to our Canadian supplier, it's the fault of the Canadian government who has deemed black patina a hazardous substance and therefore not saleable in its current format.
But get this- they think buying it in a 2 gallon container with less labelling is just fine, or that copper patina in the same size bottle with the same labelling is perfectly safe. 
We do have some 2 gallon containers and are willing to fill your old (bought legally) black patina bottles if you bring one in.