Remote control of 8 'esek' switches from a switch board - looking for a solution

Hello.
The issue is this: in a certain room I have 8 'esek' switches to control the lighting. I would like this lighting to be controlled remotely from the other room. I found such a device, which seems to meet my expectations - http://m.ebay.com/itm/250819360778.
However, I would like the relays to be controlled not from a remote control but just from a permanently positioned board with switches that would send a signal to the receiver. Can you recommend any specific ready-made solutions? Thanks.

You may be tempted to control it with a smartphone via the popular Arduino. The circuit is easy to make, there are ready-made projects,

However, that is not the point. If the layout was directly for me, I would have made it long ago. However, the point is that it should be a finished set with invoice etc. Everything needs to be documented.
Also, if anyone is able to recommend a product or shop, I would be grateful.

Elmes CH8NT - you fix the housing to the wall.