I bought some ebay mudflaps suitable for c3 aircross £16, thought I would fit to try to reduce rear window getting dirty. Anyway tried to fit to front had to cut away bottom area of mudflap then used original T15 screw but added another two looked good.
Rear mudflaps were slightly longer in depth fitted fine managed to fit using original two screws plus one more.
Final assessment, rear mudflaps not covering outside of tyre, could have been a little wider but otherwise pleased just need some rain to test.