Shipping costs were just one of the factors that made the lining process impractical. While I did not need to export/re-import them, I did need to use Customs Brokers and Freight Forwarding services which were bloodly costly, especially in the UK. Best of luck with it and do let us know how you make out.
Steve

http://www.bertramandco.com/
Booking African hunts, firearms import services

Here for the meltdowns