Please check the latest stencil set, linked from the bottom of the NSP page in the Expert Center, here in the McAfee Community.
Hmm. Try again? I just clicked the link and got through to the NSP guides in the Expert Center without a issue,
Yes, i've just click on the last url at end of expert center https://www.mcafee.com/resources/misc/mcafee-network-security-platform.zip
And get error 404 page not found