You can buy it yourself
Millet air conditioning is without a bracket, not only millet air conditioning without a bracket, other brands of air conditioning is basically without a bracket.
Millet air conditioning standard is not with external machine bracket, basically no brand of air conditioning is standard with external machine mounting bracket, these brackets are purchased when installing, you can buy your own to be installed by the manufacturer, you can also buy the optional accessories provided by the manufacturer.
You can buy it yourself, there are physical stores and online, you just need to buy it yourself.