Here are the parts used for this subassembly and the bags that they come from.

ZT-KIT-00137 - End Stop Switch Kit - contains: End Stop Switches + mounting nuts and bolts

ZT-KIT-00139 - Reprap Fastener Pack - contains: M3 nuts, M3x8mm SHCS, Lock Washers

ZT-KIT-00153 - Kossel Sundries - contains: Rail Spacers

ZT-KIT-00124 - Kossel Chassis Upgrade Kit - contains: End Stop Switch holder plastics. This part may be replaced by 3D Printed equivalent; see file ZT-3DP-001??