I am interested in the electronic components needed for remote control
transmitting and receiving.  I need the approximate size, approximate
lowest price (both individual and bulk), and a few suggested
supplier/manufacturers that can supply in bulk at the those prices. 
Since I am wanting to wire these components into other units, I only
need the sending/receiving units and not remote control pads and other
equipment designed to do more than I need.  The units in question must
be of sufficient power to send and receive a simple signal inside of
an average size house.

As you are looking for area rather than line-of-sight coverage, you
will need radio rather than infra-red applications. Licenced apparatus
and frequencies for this application will depend on your jurisdiction.

For the UK, 
www.maplin.co.uk click on Products > Toys and Kits > Projects > RF Modules

The manufacturer of some of the Maplin products are RF Solutions, 
http://www.rfsolutions.co.uk/acatalog/products.html

Owain

I do a lot of RF remote control.  I've used transeivers from the
following web sites.  You may find them useful.

www.linxtechnologies.com/
www.ratiotronix.com

-Ed