To just do the kick panels, I'd go to a good shoe repair shop where they sell spray cans of shoe coloring. You will probably find something acceptable for a couple of dollars. Yo don't dye vinyl, you essentially paint it - in fact, as you aren't concened with flexibility on the panel, you can shoot it with hardware store spray paint that might be a closer color match. You might have to overshoot it with a clear semi matte finish to match the sheen of the surround. This will help to protect the finish too.

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