/cgl/ - Cosplay & EGL

Does anyone have any good ideas on either where to buy thigh highs with a single white stripe or how to effectively add a white stripe to plain black thigh highs? They're nothing super difficult, just the same anime-style thigh highs a lot of characters have, like in the pic.

I considered using fabric paint, but imagine it will crack and look messy as you can't really tape things off on delicate fabric.

I tried white ribbon, fabric, and elastic but it won't stay up without gluing them directly to the thigh highs.