I found Christoph Gohlke´s Prebuild Python Library on the Wayback-Machine:
https://web.archive.org/web/20230702115900/https://www.lfd.uci.edu/~gohlke/pythonlibs/
Not every Wheel-Link has a Snapshot for the “Wayback-Machine”. If you want help to save the prebuilt libraries, you can click on a link and make a snapshot for the wheel. There are a lot of wheels! So, it would take a long time to save all of those links alone. Please make Snapshots and save the prebuilt Python- Wheels for the future!
If you do not know where to download prebuilt python libraries elsewhere:
Here it is:
They provide also prebuilt Python-Wheels for simple download! Or use as usual pip.
Conda is an alternative package manager that often provides prebuilt binaries for a wide range of packages. If you’re not already using Conda, you can install it from Anaconda or Miniconda. After installing Conda, you can use it to install Python-Packedges!
I also found a Python-Modul-Manager for Blender that
still works with Blender 4.1:
Happy Blending! 