That looks like a nice find you have there, hope to see the car at a race track very soon.
Seems you have had little luck here, but perhaps you should try the Atlas guys
http://www.atlasf1.com/bb/index.php (I hope Mods let this though)
There is one guy whose name escapes me (Dcenterini ???) who has a whole history of the Fiat racers. He does pop into 10/10 now and then. Plus our own TimD who has a transit van plus, full of old magazines and race programmes. so I hope that between us we can help you out.
Simon