Recently Stephen Heiner was interviewed about the sedevacantist position by a Novus Ordo of seeming good will. You can find the interview here: https://soundcloud.com/cvs-podcast/catholic-vs-catholic-2017-09-30-stephen-heiner
If you have Novus Ordo friends of good will, you might follow up with the following episodes, which were sponsored by Novus Ordo Watch:
Three hour episode examining six documents from Vatican II
Five part, five hour series examining Vatican II by Bishop Sanborn
Your Novus Ordo friends want smoking guns? Don’t focus on Bergoglio or even Ratzinger. Go to the heart of the issue: the counterfeit so-called “council” of Vatican II.