Roof rack WITHOUT railing for Mini Countryman ALL SE Hybrid (F60)

Hello together! I am looking for a roof rack for my Mini Countryman ALL SE Hybrid (Bj. 2017, i.e. F60). Unfortunately, it has no railing or mounting points. On the homepage of various manufacturers (e.g. Atera or Thule) only a list with railing versions is displayed in the vehicle-specific selection after input of Mini/Countryman/F60/… can it be that for my model – so without railing – there are no roof racks at all, respectively none fit? .B. at Thule so many different systems with vehicle-specific mounts, which one clamps into the door frame (so-called mounting kits). Has any of you ever mounted a roof support on an F60 series of Mini without railing, or experiences with it? If so, which products? Thank you for the answers!