A few more tips.
Fed Ex is probably the way to go, but do not insure the package (or use the an absolute nominal insurance amount). Otherwise, it may slow down the package delivery as will as force receipt costs on the German side.
ProSpine
Spitzwegstrasse #64
93051 Regensburg
Germany
Here's your friendly American friend residing in Deutchland - sie freundlich behandeln und gesagtes I erklären ihr hallo:
Anita's Profile on ProSpine
PS: I have NO business affiliation with any doctors.