I just tried a mono to stereo adapter, and to my surprise, it worked perfectly. I fully inserted the adapter into the IR port on the MRF-350. I then used a normal stereo cable and fully inserted it into both the adapter and the jack on the back of the TV. Works like a charm, and only cost two bucks! Hopefully this information will be helpful to people who find themselves facing a similar conundrum in the future. :)

Here's a link again to the adapter I used ...

[Link: amazon.com]