Re Amplified Communications Extention Speaker
Radioshack carried/carries a couple of different models- one being larger than the other.
The model you are probably interested in is sku. 210-0541(a)* -it was discontinued right before Xmas 2009.
Which is not to say it might not reappear later recontinued, or as another sku number.
The website rarely carries discontinued items, however if you call one of your handy dandy Radioshack stores and ask them to search for sku 21-541 locally - odds are good some are still in area.
an alternative product would be the 21.549- however it is not amplified.
Good luck,
Browsingthru
*the (a) referring to the packaging.