When I imported my Jag I got the CoC direct from JLR in Coventry, but the Emissions booklet had to come from Emil Frey, so there is no avoiding the local importer when bringing in a car.
The problem with BMW seems to have come from Munich, if the dealers in Germany had it written into thier contracts that they weren't allowed to sell cars outside of the Eurozone (as explained in the Reuters article), well that could only have come from BMW top management.
But BMW Swiss were reciprocating, refusing to provide CoC's and no doubt the Emissions booklets too.
This is all secondhand information I got from my mechanic, I wouldn't know myself, I hate BMW, I would never give them a cent.
But that's just me....