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gta_fender_roll
I use the Cusco Sports Accelerator Pedal.
However, pedal overlays and spacers tend to cater to the problem of difficulty reaching. It seems like you have the opposite problem, which is to say they already seem too close together for you. Most of the options you mentioned would perhaps make the problem worse?
If there is a spacer that allows you the option to increase the lateral spacing between the brake and accelerator, maybe that can help