First question, why buy finish size shafts in America then ship to Europe? Shipping something from one climate to another like 'finish size' shafts is just asking for a high amount of reject shafts once they are in country for any amount of time, IMO. Finish size has no room for any movement, and after a trans-atlantic trip, trust me, there will be movement! Whoever is on the receiving end in Europe is better off ordering maple boards and aclimating to their enviroment then machining their own shafts from those boards....much less waste and higher ratio of usable to non-usable shafts.
No supplier I am aware of would back their shafts (final size) in that kind of senario.
Just my thoughts,
Dave