When you are looking for some old plugin and google searching failed:
1. some of those plugins are still accessible via e107.org and menu 'Get plugins'.
2. you can try to find them via Plugin Manager in your e107 installation.
3. you can look at https://github.com/Jimmi08/e107-old-plugins
The good source for old plugins too:
If you have a plugin that is not listed there and you use it, let me know.