Undskyld at jeg skriver på engelsk.
I just received my tickets for away section, and what I did was to buy the vouchers from vivaticket and then, a friend of mine in Rome went to LazioStyle calderini and presented my ID documents, and today they have issued the tickets and send them by email.
I believe you can email both your vivaticket vouchers and ID pictures to the following email and call them up to follow up and hopefully you get your tickets by email.
Email: laziostylecalderini@sslazio.it
phone: + 390632541745