Check out Scheels or Mills Fleet in Waite Park. Mills also has a bulk fishing tool area right off to the left when you walk in that has $5 split ring pliers. They work fine.
Really, it shouldn’t matter all that much what ring a person uses, just as long as it doesn’t allow the hook to slip back through it, and it’s stronger than the 4-10lb line ice anglers use with spoons, which it will be.
VMC rings are generally what I buy. Just match the size with what’s on the spoon already.