Based on this product's specifications, here are some alternatives and similar models
Switch lever for Heidmann 125 mm random orbital sander — replacement part CH00442-9
Summary description:
Replacement switch lever designed for Heidmann 125 mm random orbital (eccentric) sander models, part number CH00442-9. This mechanical control lever fits the sander's power/speed switching mechanism, restoring reliable on/off and mode operation. Suitable for repair and maintenance of compatible Heidmann 125 mm orbital sanders to extend tool life and ensure safe use.