Parts such as the Footrest: Bolt (10x28), E Ring, Spring,front F, Guard,front Fo are included in the Gsxr750 2007 (k7) Usa (e03) Footrest parts fiche.
This schematic depicts all components used in the Gsxr750 2007 (k7) Usa (e03) Footrest partslist.
On this parts fiche the Bolt(8x23) is the most specified component.