Based on this product's specifications, here are some alternatives and similar models
Spiral binding coil ARGO 6.4 mm, black, model 424062
Summary description:
Binding coil for manual or machine bookbinding: ARGO black spiral 6.4 mm (model 424062). Designed for punching and binding loose sheets into booklets, reports or manuals. Compatible with standard binding equipment that accepts 6.4 mm diameter coils. Provides flexible, removable binding and orderly page turning for office, school, and print-shop use.