This tool was created using the Acquisitions API and the web development framework CodeIgniter. I'll be posting it to GitHub in the near future; it requires a bit more work to get running than the other 3 examples, in part because it requires a web server & API keys, and in part because it depends on local factors like fund codes. If you'd like to discuss trying something similar at your library, I'd be happy to discuss whether it might or might not work for you.