Andimiro Sensors
I have a king of hammer and most of the problems are those sensors in the base of the unit. I think they are just 940u IR transmitters and receivers that you can buy on eBay and I forget exactly which ones I used but I bought a whole bunch of them and experimented until I found ones that worked. There are usually just two main wavelengths that are used in games that I have seen the 890??? and 940, Mostly 940, but I noticed that some are able to transmit over longer distances and some only go an inch or two. Sometimes you can get the part number from the schematic and just order the IR LEDs from Digikey or get some other ones from digikey but contact them first and make sure they can transmit at least the five inches it needs.
I have done this on most all games that need IR LEDs because those prices for the little boards are ridiculous.
Russ