WTB: Tracking bar with half-nut

[erunltd]

Hoping to find a parts machine like the Pathé coquet pictured.
It is neither a rare or expensive phonograph; however, it does
have a part I am looking for. The other photo shows the bar
and tracking half-nut.

If you have one available or a cheap coquet parts machine,
let me know with pic(s) and price.

Thx.