Based on this product's specifications, here are some alternatives and similar models
Spindle shaft DNM Trzpień 210 mm — DNM model SDNM0018, 210 mm length
Summary description:
DNM Trzpień 210 mm is a 210 mm spindle shaft (model SDNM0018) designed for use in compatible machinery and assemblies. It serves as a rotational or mounting element, providing defined length and fit for shafts, couplings or tooling setups. Practical for workshop repairs, replacements and equipment maintenance where a precise 210 mm spindle is required.