Based on this product's specifications, here are some alternatives and similar models
Roller Handle Polax Ø6×100 mm — tubular paint roller handle, metal shaft and grip
Summary description:
Polax roller handle Ø6×100 mm designed for use with small paint rollers. Features a Ø6 mm diameter shaft and 100 mm length suitable for attaching standard small covers. Tubular construction with metal shaft provides secure mounting and stable painting performance. Intended for indoor painting, touch-ups and small surface applications; compatible with compatible small roller covers.