Where do we find conda packages from 10 years ago?

I made some progress. I found the “free” channel on anaconda.org and this channel seems to have older packages. The env file I trying to get running is:

# CONDA_CHANNEL_PRIORITY=false conda env create -f perturbed-data-paper-env.yml
name: perturbed-data-paper
channels:
  - defaults
  - free  # old packages may be here
dependencies:
  - ipython==3.0.0  # for Python 2
  - matplotlib=1.4.2
  - numpy==1.9.2
  - pandas==0.16.0
  - pip <21  # for Python 2
  - pygments==2.0.2
  - pytables==3.1.1
  - python=2.7.9
  - pyyaml==3.11
  - scipy==0.15.1
  - seaborn==0.5.1
  - decorator <4  # trailets
  - pyqt==4.10.4
  - pyside==1.2.1
  - pip:
    - DynamicistToolKit==0.3.5
    - GaitAnalysisToolKit==0.1.2
    - oct2py==3.1.1

This now installs and is close to running the 10+ year old scripts I have. I had to set the matplotlib backend to agg because the old packages link to system libs that are too new for qt to work. Also I had NumPy 1.9.1 and that had missing symbols or something. I’m now hung on oct2py needing an old octave to run, which isn’t installed by conda or pip.