I can confirm it still exists in some places. For instance, was in Leipzig a couple of months ago, and can confirm that one of the main local venues, East of the city, offers it as a rule. I would even assume all girls provide it - assuming you pay the +20€ for it. But then the hourly rate is 110 or 120, so that's still way cheaper than in London or Paris. From what I read in German forums, I would assume the agencies in Berlin can provide it - at least some girls, the trick being to be sure the one you pick will accept OWO, which isn't a sure thing.