Have a look at the Abitana range of products. www.abitana.com the site doesn't work to well with firefox browser. Their UK distributor is at www.minitran.co.uk
Another product is that by Square D http://www.konnect2.net/lexcom.htm
Vex can give you more info on this system.
If you want more info on the Abitana system and what it can do, let me know.