I was thinking of getting the Autometer Cobalt gauges, but they're MAD expensive compared to the regular Ultra-Lite gauges, like $50 for a Ultra-Lite water gauge and $120 for a Cobalt C2 water gauge . What a ripoff, so im wondering if there was any way to create the same kind of blue backlighting on a Ultra-Lite gauge that looks similar to a Cobalt C2 gauge? If there is just a small bulb that I just have to replace, what size is the bulb and where can I get it?