The cylindrical stereographic projection is available as d3.geoCylindricalStereographic in d3-geo-projection. With a parallel of 45°, also known as Gall’s stereographic.
Changed /mbostock/raw/4090846/world-50m.json to a local referenece
https://d3js.org/d3.v4.min.js
https://d3js.org/topojson.v1.min.js