Emulator for Redmi devices

I am trying to test my apk on all common android devices and I am doing it with emulator skins, but I can only get emulator skins for Samsung devices. They provide Emulator skins on the official website.

http://developer.samsung.com/emulator/emulatorOverview.do

And now I want to test my apk on Xiaomi, Lenovo and Moto devices but couldn't find a way to do it. Can someone tell me if there is a possibility to get emulator skins of these devices or any other alternative.