Create your own program with Google Docs to grab data
If you don't want to use a plugin, and you want something custom and a little more robust, follow the instructions for creating your own program for data mining. Most of the hard work is done for you. You just need to put it together as you see fit. As a disclaimer, you probably don't want to do this unless you're at least a little familiar with writing code. This is, however, pretty basic, and comes with outstanding instructions. So, if you follow them, you should be fine.