139 posts in some 16 days - I can see why now - WTF was the point in posting that - are you Donz in disguise lol!
There are very few tuning options for the 1.6 engine unless you want to spend serious money. Try PowerAlfa for C&B cams, they are the only people in the UK currently to import them. Other than that try the www.bravo-guide.co.uk mod-a-bravo section and get in touch with some of the companies listed.
You may get another 10BHP for under £500 but to gain more than that you are going to have to spend big I am afraid.
Nige
Fiat Punto JTD
Fiat Barchetta
http://www.angeltuning.co.uk
http://www.bravo-guide.co.uk THE Fiat Bravo site