this woman might know
https://www.karina-sturm.com/en/contact/
you can also call the makers of DMX machines...there is DMX-works...Konica i think...etc. and maybe ask them if they know of any machines that exist in germany.
google search isnt bringing up anything. i know some people who had it done in london
you may also want to call the OREME office in Belgium (they do regenexx PRP/Stem cell procedures). They used to treat CCI so they may know where you can get a DMX or they might even have a machine themselves.
you could also see if there are any NUCCA chiropractors in germany and ask them
you can also try some neurosurgeon's offices.
if there is nothing, i guess you would have to go to london or spain to get it done. but i would be surprised if there isnt at least one person in germany doing them!
good luck