Parts such as the Repair Kit: Gasket, Cylinder Head 1 (nas), Oil Seal (6e5), Plug, Slow Jet, Oil Seal (6e5) are included in the C115trr (c115tlrr/txrr) 1993 Repair Kit parts fiche.
The most expensive part in this assembly is the Power Head Gasket Kit (nas).
In this schematic the "Gasket, Valve Seat (nas)" is used most often.