TP-Link TL-WPA8630P Powerline Kit
1200 Mbit/s
TP-Link TL-WPA8630P Powerline Kit
1200 Mbit/s
You can buy an extra remote (TL-WPA8630P), but here in Switzerland, the price is more than the combined kit (TL-WPA8630P KIT)! The reference number for the base unit, that connects to the router is TL-PA8010P. Hope this helps.
Seems that you can use other powerline extensions though I have not tried it. (superuser.com/questions/935902/can-i-mix-and-match-ethernet-...). Digitec seems to offer a 3 extension kit or why not try to order from the Tp link web site directly? (www.tp-link.com/ch/home-networking/powerline/tl-wpa4220/?utm...)