Tamiya uses (or at least used to) Sharp receivers. Those specs sound about right, but there area few different types, i.e. solid molded, metal incased, etc. I don't know the difference in terms of reliability and performance, I just copied everything Tamiya did, even using theatrical filters to eliminate all other bands of light not in Infrared. I researched and amassed all of this to build apples that were TCs.
I had the pyramid mirror, the sensor, the belt was the opaque light filter and it even had fins in the design so it allowed slope defense. Problem was the slope defense wasn't as severe forward to back since a scale figure isn't that thick at the waist (unless I made him obese). The whole piece had the same base as a TBU, so it just plugged in, but instead of a mushroom, you had a TC or the same quality as my sculpts.
Then I came up against the reality of RC IR battlers: they are an immoveable force when it comes to change. So there was no reason to go into production with such a small market, I just did all of this just for fun in my back yard, which my sons outgrew. The last project was FPV, I bought the cameras and all but we never even got around to it.
So, the offer stands if you're interested, I'm not using the sensors, I have probably about 40 of them on hand, if you want them, I'll grab the invoices and get the price (it wasn't much) and send them your way. I'll even cut off a piece of the filter scrim sheet that'll get you to eliminate the sunlight interference. Better in your tank than taking up space in my shop. You don't need to buy all of them, just what you want.