Here is a font that can be used to create chord diagrams. It has just about everything you need to make diagrams of any chord for any fretted stringed instrument.
The font comes in both TrueType and OpenType formats. I'm not going to provide instructions on how to install them. That's what search engines are for. As far as using the font, documentation is included in the zip file, and I will gladly answer any questions regarding its use.
I've finally finished making adjustments to this, and I decided it's time to put it up here before I decide to add a million new features. It's still not perfect, so there may be more updates eventually. Or not.