For anyone following my blog for the fanfiction reviews, I've started to build a section for brief links to stories with "Magical-Muggle Cooperation" elements at the bottom of the "Recommended “Politics in Harry Potter” fics" page, pending my having time to give the topic a proper list post of its own.

http://blog.ssokolow.com/archives/2017/08/09/recommended-politics-in-harry-potter-fics/