Location of Crosshair File(s)

Does anyone know which VPK contains the file (or files) for the weapon crosshairs, and what the name/format is? I had an idea that at least one of the crosshair files was a .ttf, but I couldn’t find anything based off that.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.