Based on this product's specifications, here are some alternatives and similar models
Numeric Punch/Stamp Set Beta Tools 3 mm digits (model 100030K0) 10-piece metal stamps
Summary description:
Metal numeric stamp set by Beta Tools, model 100030K0, with 3 mm high digit characters designed for marking metal, wood or plastic. The set includes individual stamps for digits allowing permanent embossed or indented numbering, serializing parts, and identification of components. Suitable for hand striking with a hammer and workshop marking tasks.