Modular sofa (Brimington S43)

Photo for reference. Hi maybe a long shot but my daughter has just moved to an upstairs flat and couldn't get her sofa up the narrow stairs. She had no option but to leave it outside so now ruined. She currently has a bean bag to sit on. Only a modular sofa that comes apart into smaller units will go up the stairs. If anyone is gifting something suitable or similar smallish furniture we would be grateful. Collection is not a problem. Thanks for reading.