You would have to check with the exhaust supplier where you have seen the sportex exhaust if they offer to post to portugal where you have seen the sportex exhaust and a worldwide parcel company like DHL if they dont offer their own service for a price on importation to portugal
i run a sportex on my 1.2 16v conversion VERY LOUD!
mine was a 899 back box adapted to fit the 1.1 system in place, i use the centre exit 3inch style they do loads of boxes with different pipes on they make the system for alot of cars aswell my mate got a 106 with one on!