TD5 rear seat problem

Hi All, newbie but here goes, I have accidentaly pulled the rear seat cover of my double rear seat, it is the hard shell at the back of the seat, It appears I have broken some of the white threaded type of clips, does anyone know where I can get some, I have an E/S beige cream leather , although these clips go into the seat frame somewhere.

Google out HZM100240 and see where u find them cheaper, e.g. Britcar (UK) Ltd > HZM100240 REAR SEAT BACK FASTENER CLIPS DIS11 (G) i didnt find others then genuine and these are all about the same price

Thank you sierrafery