Help IDing an unmarked air drill

[thingfixer]

Greetings fellow garagejournalists,

This little palm drill was in a toolbox (along with some other broken air tools) I bought from a retiring colleague at work. It has a 3/8" Jacobs 31BA chuck; other than that, there are no identifying markings. It's missing a trigger, so I hoped someone here might be able to ID it. I don't urgently need it, but I think it looks nifty and it'd be nice to be able to find replacement parts. Thanks in advance!

 

[thingfixer]

I hate to bump my own thread, but in the unlikely case anyone was curious, I think it's most likely an Uryu. Sioux drills have a similar shape but I can't seem to find one online with this plunger-style trigger. That being the case, if anyone has a bricked Uryu drill with a trigger like this one, I'm in the market!