STAX SR-Σ - Entire Headband Assembly.

Alright,

This isn't just a print and go kinda thing here. You'll need to prepare.

You'll need -

1) Nuts and Bolts for attaching the Yoke to the Band.
2) Original STAX SR-Σ (Screws) or Aftermarket.

Print all parts, saw the Nut to the length where it doesn't hinder articulation, I would give exact dimensions and stuff if I had the time but I'm really busy atm.
Once you saw the nut, you can either drill and glue it in the pre designed hole beneath the band, or you can heat fuse