Do Mac still make chargers compatible with Macbook Air (13-inch, Mid 2013)

IIRC the MBAir only requires a 45W MagSafe 2 Charger (check the rating on your original charger to be sure). Any charger of equal or larger size will work just fine with the MBAir. If you have more than one Apple laptop I would recommend getting the 85W charger so it could be used with any of your Apple Magsafe2 laptops.

Edit: FYI, Apple now considers the 2013 model "Vintage" which is why they likely removed references to it on the product pages. I don't know why Apple does this.

Here are the MagSafe 2 Chargers from the Australian Apple Store:

https://www.apple.com/au/search/85w-magsafe-2-power-adapter?src=globalnav