I live in germany. I will not get into that business. But maybe I can give you a pointer anway. This courier service is one we´ve used at our company for many years. Reliable, prices are reasonable, they do international shipping. Local firm in Düsseldorf.
What I don´t know is wether they speak english well enough and would be comfortable handling your business, they usually serve german clients I believe.
Just shoot them an enmail in english and see if they respond at all and if the response sounds resonable:
http://www.alpexx.de/home/