Based on this product's specifications, here are some alternatives and similar models
Binding Thermal Covers ARGO Standing A4 12 mm white pack of 10 (MPN 430121)
Summary description:
Thermal binding covers ARGO Standing for A4 documents, 12 mm spine thickness, white finish, pack of 10 (MPN 430121). Designed for thermal binding machines to create professional-looking booklets, reports and manuals. Suitable for binding up to approximately 120–140 A4 sheets depending on paper weight. Provides a clean front cover and rigid spine for office, school or home use.