I am new to this site . looking for help to identify this light fixture and find a part

Rather than try to find a stem to what will be a light, probably discontinued ?

First, measure the stems, take the picture and request to a Loews or Home depot for a satin nickel stem kit . Really all you need is for the stem to cover a wire that lifts the dish to level. Amazon has stem kits: )

Or.

Or far easier? Get yourself a new light unless you love the french art deco style.

There are a billion knock offs of the light and the style at as many price points

I’m a bit confused but one arm is missing? Is there a brand stamp or serial number inside the base?

Good advice. I will look into a stem kit or just buy a new light . There are certainly many cheap optikns available

IMO get a new light the hunt for parts can make you crazy and unless this light is theprefect one get anew one.