By all means have the Zetec-S bumpers front and rear,but you would be better off with the ST
version on the rear,purely because it looks better
and is more versatile,you can get them with
single or double exhaust exits,this will benefit
future mods like larger exhaust system.
You will require a new lower grille,and fog light
surrounds,the fog lights are unique to the ZS,
don't buy ST220 type they are different,a new
fog light wiring loom will be needed.
Some Finis numbers for you here.
Fog light surround FD 1132750 and FD 1132751
£14.95 each + vat.
Fog light FD 1122816 = both sides £68.41 each +vat
Chrome bezel for fog light FD 1132752 £16.43 each + vat
Side skirt bodykit FD 1208971 £239.47 +vat
The lower front grille cost is £14.29 +vat.