Found this on ebay:
http://www.ebay.com/itm/IOS-Android-Smartphone-control-4-Channel-Wireless-Relay-Kit-for-Cars-WIFI-AP/321191029473?_trksid=p2047675.m2109&_trkparms=aid%3D555003%26algo%3DPW.CAT%26ao%3D1%26asc%3D142%26meid%3D962216198496163743%26pid%3D100010%26prg%3D1076%26rk%3D5%26rkt%3D15%26sd%
Hello,
Here's some hardware that should be able to control relays via ethernet. Can't
say how good they may be since I haven't used any personally. Also their
choice of software tool chain seems a bit odd, but without having tried them I
really shouldn't be critical.
https://www.ghielectron