Previous version of nVidia driver needed

[jambi5ba]

Hello to the community!

I'm a Thinkpad T510 owner (see the signature for specs) and I need to download the older version of the nVidia driver provided by lenovo, because the audio streaming to external tv through the DisplayPort doesn't work anymore. It's a known issue of nvidia driver and many users reported it. But I can't find it in lenovo support site nor nvidia. I searched the web but nothing. Can you help me to find the driver?

Thank you, Michele