Back in stock on Aliexpress
I bought these before but they stopped showing up on Aliexpress. Both are now back in stock.The Pro Micro clone is not an exact copy of the Sparkfun Pro Micro. It will not work properly in many split keyboards.
The green Arduino Micro clone is also different than the genuine Arduino Micro. In many ways it is better since it is thinner and has components only on the top side. It also has a Micro USB connector instead of Mini USB.
You can find the green Pro Micro by searching for BTE17-05.
The green Arduino Micro clone is listed under CNT-013.
They do not come with any headers. Just the board by itself.
I bought several.