Based on this product's specifications, here are some alternatives and similar models
Linear trench drain 600 mm with fillable grate, polished finish — SpiroFlex B054402600
Summary description:
Linear trench drain (600 mm) by SpiroFlex with a fillable grate and polished finish. Designed for surface water collection and channeling in areas requiring a discrete, load-bearing drainage slot. Suitable for terraces, balconies, walkways and light commercial areas. Features a removable grate for maintenance and a design meant for integration with surrounding surfaces.