Found these at O'reilly auto parts. The sell for $1.36 at my local store. One end of is a valve core removal tool. The other end is a screw on deflator. It had a solid pice that depresses the valve core and a small hole to let the air escape. I bought one to try it. It worked well to deflate the tire on those frigid days to keep your hands away from cold blowing air.
Since then I bought 3 more. It takes a little over a minute to deflate 1 tire from 28psi down to 12psi. I am thinking about drilling the hole out to let air move out quicker. But for about $6 they did well for me.
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