I've created a small software project that simulates the sound of my Model M space saver when typing on my notebook. Audio is played using OpenAL, which has great support for creating a realistic 3D audio scenery.
Currently it's running on Linux only, and needs to be built from source, so I'm afraid a bit of software expertise is needed to get it running. On the other hand, I expect a high correlation between software expertise and buckle spring keyboard users, so this might not be a big problem for this community

Source can be found on github here: https://github.com/zevv/bucklespring
Enjoy!
Edit: bucklespring now also runs on windows.