The number of jack pads you need depends what you plan to do when lifting the vehicle. I consulted with a Model X owner. If you are just removing or changing a single tire/wheel then a single jack pad is all you need. Likewise if you are rotating your tires front to back, not crossing over, you only need one jack pad. Both wheels on the same side of the vehicle can be lifted off the ground using floor jack and a single jack point, jack pad.
If you are rotating your tires, crossing over, so the front left tire is moved to the right rear location then you could still do this type of tire rotation with one jack pad and a set of jack stands. If you go to a tire shop to have this done they will probably use a four point hydraulic floor lift. For this type of lift you would want to use 4 jack pads. (The tire shop may have a set of jack pads for Tesla vehicles. If you give the customer service employee at the counter your jack pads the tire shop worker actually performing the work may not use them. If they know what they are doing, have lifted Tesla vehicles before, the technician can use a four point lift without using jack pads and not damage the Tesla vehicle. (In most shops, customers are not allowed inside the work area due to insurance restrictions, or so they say.)
I ended up purchasing a single ReverseLogic low profile jack pad (the new low profile Reverse jack pad for Tesla Model 3/Y replaces the original Reverse Logic jack pad that was a bit thicker. The low profile jack pad makes it easier to fit, use with a floor jack if the Tesla vehicle is a performance model or has been lowered.)
There are many sellers of jack pads for Tesla vehicles available on Amazon. Based on the comments posted for these pads it seems that there was always a downside to choosing a low cost jack pad. Example #1: the jack pad is made of aluminum but due to the rubber O ring being too small the pad won't stay in place and easily falls out of the guide hole. Example #2: the jack pad is made of some mystery material, rubber or plastic, made you know where. The jack pads give off such a strong odor that you don't want to store the jack pads in your garage let along inside your Tesla vehicle.
