Sorry to confirm the rumors but the PLUS model is no longer available due to very slow sales. The only remaining stock is on cpap.com. They have 5 units in the SM size: https://www.cpap.com/productpage/pursle ... dgear.html
The standard model should be fine for most everybody. It just doesn't replace headgear as in the PLUS 4 model. Of course you are free to modify your caps however you want. Sorry for any inconvenience.
SleepGuy.