For the eagle files, please check the github link esp4relay 

Next phase is to test seeedstudio and pcbway services for this board. My plan is to compare service speed, economy for 10 boards and shipping to my country.

I doubt there is any point even to try selling this @Tindie but in order to make this project complete package, i'll share simple firmware which has HTTP and MQTT interface for controlling the board with decent API calls and responses.