Based on this product's specifications, here are some alternatives and similar models
Elbow fitting SiGMA-Li KZ2012 90° 20 mm (1/2") Polypropylene (PP) BOR Plus
Summary description:
SiGMA-Li KZ2012 is a 90° elbow plumbing fitting made of polypropylene (PP) for 20 mm (1/2") pipe connections. Designed for changing pipe direction in water distribution and heating systems, it provides a compact right-angle turn. Compatible with systems using BOR Plus fittings; suitable for residential and light commercial installations.