I've a Cubase 3.x dongle that I no longer use, also have the floppies. PM me an offer, I know they are currently going for silly money on the likes of eBay at times, and Barrie at Keychange still sells them when he gets stock. Like I said though, I've got one I don't need.
Atari 260ST, 520ST, 520ST+, 520STfm
Atari Falcon, 14MB, 40GB IDE drive