ow!... didnt know DT48 where that old. Toeshey.hehe
They are and are still in production, although only Beyer Germany sells them as they are hand-made wound drivers, Beyer does have a Electrostat model ET1000 and N1000 rectifying box, If i'm not wrong also the world's first, but are really rare. I'm also considering getting the SRXmk3 but high bias.