I've got an old stereo that doesn't have a remote control. There was a model that did, and after looking at the service manual it looks like I just need to populate a PCB with an IR receiver to add that functionality. However the part isn't available in quantities smaller than 1000. I think I found one that has pretty similar electrical characteristics. What are the chances this could actually work? And yes, I realize I will end up spending a lot more effort attempting this than just getting off the couch and turning down the volume.
Some details: radio is a Sony CFD-G30. The CFD-G50 is the version with a remote. The service manual is very detailed. Here are some relevant images:
I haven't cracked it open yet, but looking at those images it looks like possibly I just need to add the IR receiver a couple resistors and capacitors and a $.05 transistor (KTC3198GR-AT). The IR receiver called for is NJL63H400A which I can't find stock for but the one I found in stock for single quantity is RPM7140-H8R.
I'm most interested in knowing whether IR receivers are pretty interchangeable or if there's a lot of tuning at the micro-controller level to work with a specific part, which would make this endeavor quite fruitless.