The Screw is the cheapest item from this partsfiche.
Some items from this specific schematic: Fork, Shift 3, Spring, Torsion, Bar, Shift Fork Guide 1, Plate, Stopper 2.
The Bolt, Hexagon Socket Head is the most widely applied product in the XJR1300 2011 5WMS EUROPE 1K5WM-300E1 18 SHIFT CAM & FORK ( two times ).