Best is to let the guys know where you are based...
Any idea where the leak is - it might be easy or VERY hard to fix - easy as in braze-weld it up "in situ" or hard as in needing to tilt the V6 engine to get the manifold out and replace it.
Buying a full set from breakers (scap yards) like reef motors is an option if they are falling apart - but then you need a Machie to fit it for you.
The friendly Alfa Romeo Club - If you are looking to buy or you are already an Alfa Romeo owner, join alfaowner.com today to get the most from your ownership