1929 Auburn Fuel Gauge

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My fuel gauge is apparently similar to some sort of manometer, and from what I can determine from the Internet was made by King Seeley.  The back housing is also apparently pot metal prone to breaking and it was patched with some goopy stuff back in the 50's.  Based on just a little research, it's not worth the hassle of fixing and the whole system from fuel sender to gauge looks unreliable anyway.

Has anyone done anything with modifying an electric gauge, while keeping the original bezel to give it the appearance of the original?

If not, perhaps my brother who likes to tinker with electronics can come up with an LED display that will provide the look I want.