you'd need all the panels & lights & slam panel to make it 'fit' but yes - the mounts are all the same

the mk3 was little more than a facelifted Mk2
 
wasn't this done with a mk2/mk3 engine transplant ? someone bolted the whole front of a mk3 cupra onto a mk2.
 
I think an F2 bumper on a Mk3 may have some issues with the SMIC, I'm not sure it'll get any / enough air to it.

would be hugely expensive to do what you suggest....