Klasing is still around ... Nick Molo has modern Klasing brake sets ...

Rich

Nick makes two modern Klasing brake housings, but his brake wheels are
all alike -- the generic stamped design that has been in use since the
1950's (if not earlier).

http://www.molocotrains.com/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c230972d/f/i/file_11.jpg

The brake WHEEL in the PS photo is a cast design and hasn't been made for
40+ years. In fact until I saw that photo I'd thought they stopped making
it 60 years ago.

Tim O'Connor