I used to have a measuring cup that had marks for pelleted feed and powdered feed weight, does anyone know where to buy these cups? I got mine from an old AG teacher

Moormans or lidners. I believe they sell the cups needed. You might also try Nasco but I am not really sure.

The Lindners cups are available to customers at no charge. Another way is to take a clear cup and a scale and weigh out the different feeds and make marks with a marker at the levels you want.