you can go on ebay and get kits to change the colors. a few people on here have done that and put up pics. If you are looking at aftermarket, there are a few options out there like this thing: https://www.denniskirk.com/407606.s...m_medium=cse&gclid=CM6qmMr45rkCFUdo7AodDF4AeA You could also find a used cluster from another bike and try to adapt I suppose. Not sure what that would entail, but probably doable if enough ca$h thrown at it.
check out the "Instrument Bulb Replacement Hunt" thread in this forum. There are some cool LED effects, but they only will look cool at night.