you can try an artists supply store locally. this is where i get mine. they have 1/8", 1/16" and 1/32" available the 1/32" is like .7 mm i think. i live in the new orleans area and i get it a david art supply but they also have it at dixie so i assume this is something that most fine art supply stores carry. find out where locals go to get oil paints and canvas supplies and you ought to be able to find some there.