Here's a few more places...

[Link: ourworld.compuserve.com] (Robert's site)
[Link: hometech.com]
http://gadgethome.com/

Another alternative is to check a local electrical parts wholesaler/retailer. If they don't carry it in stock, they can special order it for you. That's how I purchased my Leviton 6299 Signal Bridge (they had it in stock!!!).

Roland