You can call Santiago at the old factory. He has started a new business supplying build info on all the cars built. During an estate sale last year involving a British '73 Pantera, Santiago had all the info in his hand in 2 minutes- including the radio serial # (which tells me that SOME Panteras- probably only Euro builds) did get factory installed radios).
But I suggest you call Steve Wilkinson locally- he calls Santiago often, has the latest phone #s and is familiar with Euro phone systems; your info request could be part of his call. The info won't be free in any case since this is now one of the few money-makers left- besides spare parts- for the factory.