How much do these extenders cost? I've been looking for something just like this. I can't find the product on the Radio Shack site.

Does that site's search engine really SUCK or what?

I would look up the exact radio shack part number for you, but I have to head out to pick up a friend for lunch right now. Perhaps someone else has it. Or, as mentioned in another post, you can get any number of alternative devices which are either the same exact product, or are a different product which does the same thing.