Inspired by my own Fender Squier Affinity Stratocaster, I present to you a very high detailed model. All the textures and materials are changeable, so you can play with the colors and materials as you wish. There is also no branding whatsoever, it's a generic stratocaster design.
All of the materials except for one don't contain any actual texture file, it's just an Arnold shader. That leaves you with more room to experiment with your own shaders and your own render engine. The only texture is for the neck, and it's included in the download.
The meshes are organized neatly in a group structure and hierarchy with each guitar part separately, so you can easily modify any part if you wish.
Previews rendered in Arnold.