I got the Lectron CCS to NACS adapter. Nice and sturdy. Think it cost around $200, maybe a bit less.
Do note that CCS to NACS adapters should only be used on a supercharger, never on an AC charger. Teslas use the same exact plug shape for both, whereas cars with the J1772/CCS plug have physically different plugs for the different types of chargers (DC fast charging vs AC charging). That means if you want to charge at a Tesla destination charger you'll need another adapter for J1772 to NACS. Fortunately those are much cheaper, like $50.