Any idea what you would like the target to look like? There are many options at parts express. Decora style wall plates, 1/2" diameter circular targets that you mount to flat surfaces, set-top targets etc...I feed my target/signal to a hub that then connects to my processor and also other devices. Also some systems use 4 conducter security wire while others use coax, I substituted the security cable with cat5 since that can be used for just about anything and is very versatile.
Bats - I just need a remote sensor/receiver to put near my TV & cable box - preferably small enough to go unnoticed. My AVR is the only component I'd need to control with it. Thanks. I'll check out Parts Express.