http://web.archive.org/web/20041207032228/http://www.emagic.de/support/download/index.php?lang=EN

Looking for this too. My XSKey works for 7 and wanna use it for 6.4.3 on OS9
Sure could use that upload, since only getting Hrm...

Update - finally found a collection upload of the last place that had the emagic updates for OS9, OSX & Windows PC. http://download.solodrivers.com/gestor_downloads/helpdrv/Tarjetas-de-sonido/Emagic/

Files list:
http://www.oldschooldaw.com/forums/index.php?topic=253.0
The list is from the OP supernova777 as chrisNova777 aka Chris. He was very active on the vintage audio forums.

Download site:
https://macintoshgarden.org/apps/emagic-logic-updates