Those high heel-less shoes in the link above would require you to walk on your toes, since there isnothing to step onto your heel with.
I took ballet all through childhood and that developed those muscles… have you considered that? There are also poses in yoga that have you balancing on your toes.
Otherwise, if your goal is to develop those muscles, it would be best to walk tip-toe in bare feet, so you can splay your toes and use them to grip the ground. Calf raises on the edge of a stair are also good.