Apple Stores CAN get the keycaps for these models. I think they default to replacing the top case because replacing the keycaps themselves don't always resolve

Apple Stores CAN get the keycaps for these models. I think they default to replacing the top case because replacing the keycaps themselves don't always resolve the issue, but if you ask nicely at the apple store they may be willing to give you a few extra key caps if you're willing to install them yourself!