nAG interfaces for Anaconda

I am trying to install the nAG interfaces library on my iMac in order to use it with Anaconda. But I am having no luck. I have tried:

1)python -m pip install --extra-index-url https://www.nag.com/downloads/py/naginterfaces_mkl naginterfaces
and I get ERROR: No matching distribution found for naginterfaces
2) Also tried Conda install and I get same error message

I cant find nag interfaces on Anaconda.org.

Can anyone help?

Thanks

Bill