Forget about that & make your own.
I use the stick on labels that come in the Sierra projectile packs. I cut an L shape out of it of the right dimension so that if you hold it upside down, the long leg can be stuck on the scale on the balance & the short leg protrudes over the length of the line on the balance arm. I laid it out so that the long leg of the L came to the edge of one piece of the protective paper over the stickum & I stripped that piece off to fix it to the upright. I left the backing on the short leg.
If you glue it on just so the top of the inverted L lines up with the bottom edge of the line on the balance arm (that means that it won't be precisely across the centre of the mark on the frame), you can read much finer. The way I reckoned it, the width of the datum line on the balance arm is better than .1 grain.
I'll take a photo later & post it.
John