At Escapa, we have all the replacement parts you're looking for. The SRAM GX Eagle Derailleur Screw Kit includes the rear derailleur bolt, two screws needed to adjust the upper and lower derailleur stops, and a locknut screw to adjust the bottom guide stop.
Technical Specifications:
Material: aluminum, steel
Compatibility: SRAM GX Eagle derailleurs
Screw head: 5 mm internal hex
Weight: 22g
Kit includes:
1 rear derailleur screw
2x rear derailleur adjustment screws
1x lockring for rear derailleur screws
1 rear derailleur stop screw
1x backing plate for rear derailleur stopper
