found it on this page...
http://uk.computers.toshiba-europe.com/ … anguage=42
.. on which there is a link to this file:
http://support1.toshiba-tro.de/tedd-fil … 154748.zip
it was h*ll trying to find this for a toshiba satellite P300-1A8, also known as PSPC0E. mostly because of the stupid website design.
only during installation of this driver did i find out what the device is actually named: Conexant High Definition SmartAudio 221
i hope others will find this page and not have to repeat my horrible experience ):
(by the way, the zip file has kb888111xpsp2.exe inside if you havent installed the generic microsoft HDA bus driver)