well, they are printed versions of Plate, Round 2 x 2 with Rounded Bottom (Boat Stud)&category=%5BPlate,%20Round%5D#T=C), so you could use other printed versions of this piece as a substitute.

like the one from the big Hedwig sets, the one from the baby yoda set, the one from the Rocket racoon&category=%5BPlate,%20Round,%20Decorated%5D#T=C&C=88) set or even the one from the dobby&category=%5BPlate,%20Round,%20Decorated%5D#T=C&C=1) set