I have just bought a number of parts from West Coast and would recommend them. I have no connection to the company but I found Don Harrison helpful and he kept me informed at every step.
I have used Rex Marine many times over the years but just got fed up with waiting for them. West Coast supply parts from a variety of different manufacturers but the quality is right up there.
West Coast Offshore | High Performance Offshore Marine Parts & Accessories
As always with buying parts abroad I would recommend getting quotes for carriage and don't forget the duty payable.