Thanks Jeff, great detailed response!That looks like one of Dr.. Manfred Curry's designs. His designs were very advanced designs for their day. The give away is the full battens which came from his wind tunnel testing in the Fokker wind tunnel as a teenager. Based on the sail numher, it would suggest that probably at least 3 of these were built.
As to who builds boats like these, no one, some folks, or lots of folks. No one literally builds that design, There are still (mostly small yacht yards) who build traditional wooden boats (That is not a traditional wooden boat.) . I believe that Curry's boats were mostly Ashcroft construction. I doubt that anyone builds with Ashcroft construction any more. Today they would be built with some variation of WEST construction or fiberglass. If you literally wanted to build that boat and had a couple hundred thousand Euros sitting around to burn, you would need to either find an archival set of his drawings, or have a similar boat designed from scratch.
But there is a lot about that design that anticipates modern yacht design theory. So in fact there are a lot of manufacturers who build modern versions of that boat,