I use the PCS SS1F/S-5. It's $62.50 from
www.homeautomationnet.com. You'll find them on this page of their web site:
[Link: homeautomationnet.com]You could also use the Switchlinc 2383 for $89.95 or 2385 for $49.95. Either of which are available from
www.smarthome.com. You'll find them on this page of their web site:
[Link: smarthome.com]The 2383 gives you scene and two-way capability, the SS1F/S has scenes but no two-way and the 2385 has neither scenes nor two-way.