I've been wanting to do this for some time. Annoyingly the parts needed command silly prices. Front bumpers and head lights in particular are crazy money.
I would think its too hard to swap the bits over. Might need to pickup the connectors for the headlight wiring as I believe the lamps are different in the facelift.
I've got a Facelift front bumper that's surplus to requirements. It's black, but will need a paint as there's a few cosmetic scratches here and there.
Fog light holes are open but there's no bezels or lights. £70 posted or £50 collected (Woking or Gatwick).