I have tried the Pyramid plastics version...that is now on the shelf! Poor fittings and much too small to do the job. Hopeless! But their fender-extender is fine.
So I bought the Powerbronze alternative. It is wider, taller and better made with proper brackets not just holes drilled through fibreglass. And you can fit it without removing rear wheel and the exhaust! I dont know if they do matt black...mine is black gloss to match the front mudguard.
I hope this helps!