PSICQUIC download fails

[patflick]

running python3 download_psicquic.py results in the following exception:

Traceback (most recent call last):
  File "download_psicquic.py", line 84, in <module>
    download_all_ppis(PPI_FOLDER, "PSICQUIC")
  File "download_psicquic.py", line 52, in download_all_ppis
    with urllib.request.urlopen(count_url) as cf:
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 161, in urlopen
    return opener.open(url, data, timeout)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 470, in open
    response = meth(req, response)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 580, in http_response
    'http', request, response, code, msg, hdrs)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 508, in error
    return self._call_chain(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 442, in _call_chain
    result = func(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/urllib/request.py", line 588, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 503: Service Unavailable