Absolutely, done. They're B&W aluminium-domed B&W drivers (ZZ3361) – sourced them in the US in 2010 or 2011. I still have the boxes somewhere. I have the service manual and I'll see about the other specs.
Edit: Neodymium magnet. I know they're ferrofluid cooled. They sound absolutely perfect to me and have been cared for forensically, so I haven't touched them. But I do know that replacing the fluid on these specific tweeters takes minutes, should one feel the need.