I usually search for >193* chevrolet< (without the <>). I get a list of everything in the 1930s for chevrolet. I get hits on a lot of stuff that doesn't apply but it really doesn't take long to weed it out. There are a lot of parts that are good for multiple years and a lot that are mis-labled that I catch that way. I see lots of glovebox cylinders for different years. Whether they'll work on your truck or not I don't have a cross reference to say but I'd be surprised if a 38 or 40 wouldn't work. Most all have pics. If I see one specifically for a 39 I'll let you know.

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The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.