I know Mike Calnan of the Swords and Ploughshares has imported armour and artillery from europe and the UK I think, and If I remember correctly perry Kitson imported a Sexton-from the US... and did a superb rebuild restoration.. Contacting them may provide some initial guidance. 
 
However, as Chris points out since 9-11 and various world conflicts, the rules may have changed regarding importation of armour.
		 
		
		
		
		
		
		
			
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				I see you stand like greyhounds in the slips, 
Straining upon the start. The game's afoot!
			 
		
		
		
		
		
	
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