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Co-sponsor decals are tough - I found a small scan of the correct Kendall Oil sticker, but there's also an ET wheels one that I've been unable to locate. It doesn't help that the wheel brand has been sold. I tried emailing the current owner of the brand, but no response.
This is where the Illustrator skills come in. You have to be able to reproduce from a grainy picture, and also know how to optimize for cutting.