There are a wide variety of NOS forks available from Euro Asia Imports. Their website offers many Italian-made, name brand forks under their products link. The list includes Casati, Colnago, Daccordi, Guerciotti, Cinelli and Columbus.

In my opinion, either the Cinelli or Columbus fork would be a suitable and appropriate replacement, as often many 'traditional' Italian bicycles are fitted with Cinelli and Columbus components.

You cannot order directly from EAI, but you can indeed mailorder their entire stock thru Milwaukee Cycles, or any retail store that has an EAI account.

Euro Asia certainly isn't cheap, but they carry the real deal, and it's often NOS, which is pretty cool...