You might be able to replace a gauge with another one of the exact same size and shape, but otherwise it would be similar to replacing the radio in a modern car where everything is integrated: it will probably look ugly.
The difference with the older sims is that panels were often just 2D graphics, or 3D but so low-res and ugly that it didn't matter much what you did to it.
The current sims, and especially this one, have interiors looking so realistically that you can't get away with a quick fix and you need designing skills to pull that off.