You can use Wall Switch Modules - X-10 part number WS467, Radio Shack Cat.#: 980-0194
. They are designed for traditional wall switch replacement.
You can get them from X-10.com, Radio Shack or at your local Lowe's Home improvement center. Thay are priced from $12- 19.99. Depending on where you get them.
Here's a link to some information and a picture:
[Link: x10.com]Hope this is helpful!
Scott