I did a quick search and that switch is available from a few vendors, including eBay. However I wasn't able to find it under $50, which seems a bit steep to me.
https://www.nissanpartsdeal.com/parts/n ... ja00a.html
And I suppose you know that it only turns the feature OFF for the duration that the vehicle is operating. When you shut the car off it resets back to the On state, meaning that you'll have to turn it OFF every time you start the car (if that's your intention).