Based on this product's specifications, here are some alternatives and similar models
Letter Stamping Set KS TOOLS 27 pcs Model 156.0468 — metal letter and number punches, 27-piece kit
Summary description:
28. This KS TOOLS Letter Stamping Set (model 156.0468) contains 27 metal punches for stamping letters and numbers into metal and other hard surfaces. Designed for marking parts, serial numbers and identification codes, the set provides a compact selection of characters for workshop, industrial or hobby use. Durable construction ensures repeatable imprints and long service life.