7h0881293

First one of the clips has broken, they seem really fragile and always coming off. Can see the part number of that one, so should be easy to find. However the plastic parts are also broken and I've lost them, that sit in the hole shown, so now the bench won't clip in anymore, does anyone know...

Can anyone help? I'm looking for replacement plastic locking clips for my double seat. It has a part number 7HO 881 293A printed on it. Anyone know where I can buy them? Cheers