Is that the actual part number, or the one specified on the parts list in the service manual? Do note that these aren't always identical (and this can definitely affect your search results!) You should be looking at the part number on the PCB itself (usually it'd either be printed on it, or it'd have a sticker that contain it). Also, if I may ask, what is the actual issue with your receiver? How did you establish that it's that one particular board that's at fault, and have you considered the option of repairing it (diagnosing/replacing faulty components) instead of outright replacing it?