Alfa 156 JTD 1.9 Turismo Mods?

My parents have just bought a brand new 2004 Alfa 156 1.9ltr JTD Turismo but what i want to know is if there are any engine mods AVALIABLE to the UK. I'm looking for turbo upgrades (dump/blow-off valves), exhausts, induction kits etc... i want the items to be tailor made to fit the car and not just universal.
Is it possible to get about 120-150bhp instead of the standard 115bhp without spending more than £300 or $450 per modification.
Also is the car, thats being delivered tomorrow :evillol: , Rear or Front wheel drive?

Thanks alot if you can help