Just had a quick go on PS, added some gulls to the GP, used a Seat Leon k1 for them, dunno what you think?, may need new place for fogs lol.
i like the look of it
found a body kit with side grills (granted doesn't look as good as your PS.) but is not bad.
the back of it is horrible tho.
http://www.magnatuning.ro/en/product/8442/Fiat-Grande-Punto-Extreme-Body-Kit