Hmm... you can grab either the .src.rpm files or the .tar.gz files, and build from source. Make sure you have SuSE's kernel-source RPM (from your installation CDs) installed, and that you've done something similar to make -C /usr/src/linux mrproper oldconfig dep before you try to build either of those.
Build them according to the instructions in the nVidia README file.
But what's the purpose of sax? I've never used SuSE, so I really have no idea...