Check out any of the thirty Transmission components enlisted.
The Screw, Pan (3yx) is the cheapest item from this partsfiche.
Parts such as the Transmission: Axle, Drive, Screw, Pan (3yx), Gear, 6th Pinion, Gear, 6th Wheel are included in the Tdr125 1999 5an5 Germany 295an-332g1 Transmission parts fiche.