Best thing you can do is contact Don Williams (Black Hawk), they filled up the Shanghai Museum with US cars, or the Sanhe restoration company in Chengdu, they have experience with the government with this problem.
http://www.blackhawkcollection.com/index.cfm?action=contact&tab=contact
http://www.blackhawkmuseum.org/contact.html
http://www.sanhegroup.com/contractus/fx/
greetings!
http://www.blackhawkcollection.com/index.cfm?action=contact&tab=contact
http://www.blackhawkmuseum.org/contact.html
http://www.sanhegroup.com/contractus/fx/
greetings!