I found a short German Wegenerabout the company - quite interesting and considering they are still in business in the same premises as they were 100 years ago, I am sure they have a remarkable archive.
Basically, it tells that they still make hats in Germany but also in Asia and in Poland. A large amount of their revenue comes from private labelling hats for large German brands. As you can imagine though, the quality is probably not top notch. Ever since the 1950's, when one of the Wegeners went to the US in order to learn how to make Cowboy Hats at Resistol, they produce Resistol Hats in Europe under license.
They still produce top hats although they do not look anything like the old ones and the company is supposed to remain in family when the current CEO retires soon.
I will try to pay them a visit, when I am in Germany in November.