Finding an omega 490 screw for the upper bridge rotor

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Hi,

I think the part ref for the screw I m missing is 2250 (can someone confirm tho?)
It's the screw that holds the upper bridge of the rotor/automatic movement (ref 1031) to the rest of the movement.

Now my question is, is it possible to get 1x screw from a different movement/caliber (even non OEM) or any other alternative? As I don't wanna spend 30$ for that 1 screw..
 
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The 2250 is used on the 470 series, 490 series, and 500 series.