Saving D3.JS example "bullet.html" to SVG

Svg crowbar does a pretty good job for single svg elements, it is just a bookmarklet you have to add (works only on chrome). It is developed by the New York Times.

A Chrome-specific bookmarklet that extracts SVG nodes and accompanying styles from an HTML document and downloads them as an SVG file—A file which you could open and edit in Adobe Illustrator, for instance. Because SVGs are resolution independent, it’s great for when you want to use web technologies to create documents that are meant to be printed (like, maybe on newsprint). It was created with d3.js in mind, but it should work fine no matter how you choose to generate your SVG.