Have you tried the Italian Replica Club. A more specific club and I know several owners with 308 replicas. I think most are the Pontiac Fierro based examples. The Auto Milan is a bit of a rarity in its own right, I don't think they made many.
Thanks, Iam already a member of the Italian Replica Club and bought this car from a previous owner, I was told only six of these cars are on the road, to date ive had no success at finding other owners.