Based on this product's specifications, here are some alternatives and similar models
Geko Fugownica 25 (10) hand grout float GEKO G66043
Summary description:
Hand grout float Geko Fugownica 25 (10) by GEKO, model G66043. A manual masonry and tiling tool designed for applying and smoothing grout in joints. Compact and practical for finishing tiled surfaces, edges and corners. Suitable for use in interior and exterior tiling work, renovation and repair tasks where controlled grout application and compact tool size are required.