Dark Matter Guitars was a project by luthier Matt Nowicki of Red Rocket guitars active around 2016, making custom hand made electric guitars and basses. There was also an earlier Dark Matter Guitars instrument-making workshop based in the North West of England, offering both acoustic and electric guitars. It was run by luthier Andy Matthews who trained in Musical Instrument Technology - but it had closed by 2011.

Source: Dark Matter Guitars website (archived 2011)