I'm still amazed that your Brownie has learned four colors!
PetsMart has similiar balls for 99 cents each.
There are red, green, blue, purple, orange, others? In solids or marbled with white. They have a pleasant squeak, unlike that "devil ball".
(do search for thread, it's funny)
They are soft enough for Bodhi to actually pick up with his mouth. They don't bounce, but he kicks them around like a soccer ball.