Are there any PARTICULAR brands of filler tube grommet BETTER SUITED to a 1968 gas tank than others?

Esteemed C-body Moparians,

This afternoon, the gnawing suspicion that my gas tank still leaked out the filler tube grommet got confirmed by a Good Samaritan passing by, warning me that on inclines and under acceleration, Gertrude was losing LARGE amounts of petrol out the back behind the license plate. I installed a brand new filler tube grommet on the tank when I transferred it from Mathilda, noted the factory bent filler tube with some disquiet, drove a little to test it, found it...

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