Infra-Red Sensors for Installations?

ANyone know anything about infrared sensors used in home installations. You know, the type that fits ina standard electrical box and you put in a wall in another room which will accept your remote's signal and pass it along to the stereo in another room??

if so, i was told that there is a generic sensro which accepts all signals and simply passes it along. Does anyone have any info on this? I ask since adcom wants $100.00 for theirs! The adcom equipment I hope to use it with is only double that used! And I can't believe that adcom (or anyone else) developed their own proprietary external infrared sensors.

so, please anyone with a generic or even a cheap other manufacturer's remote sensor chime in!

curt
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