the frame certainly would have been made in italy in those years. you should measure it to find the size C 2 T and C 2 C for the TT. the algles are likely real close to 72 to 73.5 whatever works best with that size.
finding new Formula one decals may be very hard. Velocals makes a few Bianchi decals but his ones in this style seem to come in white, or atleast that is what is pictured. on ebay there is a gent from down under that sells some nice decals bit IIRC they are black not the bluis like Bianchi uses.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk