This company makes them with matching rein covers.I make ribbon wrap browbands and was wondering if there were a market for hi vis reflective ones...
http://www.kkbespokebrowbands.co.uk/hi-viz--reflective-browbands-and-rein-covers.html
I tend to opt for a large surface area though. White / yellow or pink ear bonnet shows up more than when I had the browband.