Gazzer,
Multiplex is built in Germany by Multiplex. I think you are thinking of the Graupner range, which is built by JR. It seems to have been a very sucessful collabaration for both companies.
To be honest Multiplex has never had the manufacturing capacity to get a real foothold in the USA. The strategy has always been quality rather than volume, one that I for one hope continues. I can't help but think that the new owners will find ways of increasing the production volume and addressing the cost base with aview to achieving more market penatration especially in the US market.
I just hope that they do not sacrifice quality and innovation.
Regards,

John.