Tesla's shop lists the Universal Wall Connector with an eligibility rule: you must be a Tesla vehicle owner to buy it. The product page says to sign in to the Tesla account that is linked to your car, or contact Tesla support if that isn't working. So the restriction is on Tesla's own store, not on the charger itself.
Your options:
- Buy through Tesla if you own a Tesla or have an account tied to one. Otherwise, contact Tesla support and ask about the rule for your case.
- Buy from a retailer. Best Buy's listing for the same Tesla-branded unit was in stock when I checked, and it lists the charger as Level 2, hardwired, up to 48A, with a 24-foot cable.
- Check stock and terms before you buy. Tesla's page has shown the product as out of stock in some regions, and the eligibility rule may differ by country.
Whatever you buy, the charger is hardwired and has to be installed by a qualified electrician. Tesla's own page says so, and the circuit needs to be sized for 48A. Ask your electrician to confirm the breaker and wiring for your panel.
Which country are you in, and what EV are you charging? The answer changes a bit depending on whether your car uses the NACS or J1772 plug.