I really do think that the parts were added by a previous owner so won't be astandard bit.
you will probably have to remove the other one and then find something to replace both of them with.
Is the snapped one not fixable?
If it is in one piece maybe you could reattach it with double sided carpet tape or something similar.
no the other one wasnt with the car,
ive actually seen the bit i need on most ford focus interior expecially the st170 but i didnt want to buy the whole door card just for the plastic strip