Use Fontello (open source) or IcoMoon to generate a font that contains only those glyphs needed.
IcoMoon can generate SVGs, including an SVG containing all glyphs that can be used with a technique detailed in SVG `symbol` a Good Choice for Icons.
GlyphSearch helps you search for glyphs in Font Awesome, Foundation, Glyphicons, IcoMoon, Ionicons, Material Design, and Octicons.