Where can I download the application to run the John Shipman jip file script?

Following on from suggestion elsewhere on Stack Overflow, I looked over John Shipman's excellent article on skip lists and python implementation documentation. The code is there, but it is split into fragments for explanatory purposes. This works great for a webpage, but I'd rather not fetch files from there. Every link I find points to the same page.

pip install pyskip

installs another implementation. I don't know where else to look.