Hi Renzo,
welcome on AF and what a nice project you have - please post some pictures when you begin/finish

Prototypes of Tu-160 ... quite rare the material. We've made an thread on german aviationforum here (you need to register for viewing pictures, free) about the russian bomber history with some pictures. Maybe you can find further missing informations there.

Tu-160 Prototypes:

View large    View medium Photo © Sven Zimmermann

One of the Prototypes in 1997, already missing some parts

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Same year, should be first production aircraft

View large    View medium Photo © Sven Zimmermann

View large    View medium Photo © Sven Zimmermann

Tupolev's own testbed departing Aerosalon Paris in 1995

Already production aircrafts:

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Red 01 and Red 02 still in full white c/s, 1997

View large    View medium Photo © Sven Zimmermann

And from this Beauty I've made some detail shots (port side) in 1997, ask if you need them

Greetings, Grimmi