Based on this product's specifications, here are some alternatives and similar models
Side Walls for Self-Supporting Awning STO80 2.3 m — Offlander
Summary description:
Offlander side walls designed for the self-supporting awning model STO80 with a 2.3 m width. These accessory panels provide additional enclosure and protection from wind and weather, fitting the STO80 self-supporting structure. Suitable for creating a sheltered outdoor area on terraces, patios, or recreational vehicles where the STO80 awning is installed.