You can also try Aero Bildung Gmbh near Munich; I've done some of my modules here.
Aero Bildung
They gave us some pdf training materials and access to their web based training tools. Then there was a one or two days long (depending on the module) course before the actual exam. All this was in English.
I'm not sure they will offer such a course for one person only, but you can give it a try.
There are several other Part-147 approved companies in Germany, the other I know is Lufthansa Technical Training in Frankfurt, but I think they offer only full courses lasting for two years. Anyway, I think most German schools give you the possibility to use training materials and make an exam in English.