Try searching for "embossing" and "stamps" instead of "imprints". That should help you better
They don't need to be fondant specific...e.g. many tools used in clay work can be used with fondant. Just make sure they are brand new (or never used on clay!). Also scrapbooking/card making tools are useful. As long as the material is food safe (no wood or non-food safe silicone/rubber, etc) you should be good to go. For example for embossing fondant for cupcake domes, I have a set of Fiskars embossing texture plates.
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