To keep working, if you buy anything Eurocopter, I would recommend you buy a bunch of spares at the same time - Macs are only the poor guys in the middle, although sending stuff through them does add a couple of days at each end of the process.
Having said that, weren't there a bunch of Allison turbine wheels destined for H & S that were nabbed by the US Army before they even left the US? Despite that, I have found that the Bell support is a lot better, especially since they have authorised shops all over - Eurocopter tends to be a bit more centralised, with the obvious problems.
phil