The one I use I obtained as a spare part, it's actually used in various Tatung and Grundig TV's - as it's a european part you will probably struggle in the states. From what I've heard, even Radioshack stock IR receivers - the particular type doesn't really matter, as long as you tune your modulation frequency to that of the receiver, this gives maximum range. Most are about 38KHz, although they can vary from about 36-40KHz. I noticed one in a TV/DVD today, it was only 1/4 inch square, if you are wanting small - that's the sort of thing to be looking for.