It can be done(i've done it) do a search it has been covered plenty of times. Back bumper bolts straight on minus the middle bolt.
Front requires a bit of work if you dont have the front splash gaurds, i also had to cut some of the pannel below the wing to get it to fit. as the front end of the facelift is wider so your source ibizaboy 1.6 is right. Some people have mentioned using some tin to take it out a bit for the bumper to fit.
But i had a spare facelift car to play with and had all the brackets and splash gaurds to play with.
hope this helps