Are there any indiglo gauges available for the sc300?

 

not that I know of... no point since you can always easily see the gauges that are on the car... it'd be kinda tuff to replace the stock gauges being the way they are...

of course if you're talking about aftermarket accessory gauges like a Boost gauge or EGT gauge, then there's tons of manufacturers for those... Apexi', Greddy, Blitz, HKS, etc
Apexi's EL Gauge series are really nice...