Not sure if this is helpful but the plastic from a 1-gallon used bottle of antifreeze or oil is fairly rigid... The color scheme might not match thou, but the semi-curve of a cut-out just might be the perfect fit for some application.
If not for the vehicle, I usually cut one open if I need a flat pan with edges for use as a 'parts' tray
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A FE gauge should be standard equipment in every vehicle.
GasSavers_RoadWarrior 
cfg83 
Threaded Mode
