make copy of your registration book, keep it in file. and locate some work or family friend who can extend help in terms of time.
you may ask some work colleague or a family friend, send original book by TCS duly insured, with an sms alert for delivery of book, request that colleague to visit NATIONAL BANK M.A Jinnah Road branch next to Nishat Cinema, opposite Naz Plaza computer market. That branch have 1 permanent excise officer with live online excise terminal. In & out will take not more than 15 minutes.