I was looking for If-Found Kayak Stickers and came across the US Coast Guard Auxiliary page. I sent an email and they responded quickly and asked me to please share widely. They will mail them to you for free. Here's the site: https://wow.uscgaux.info/content.php?unit=130-04-08&category=if-found-contact#:~:text=For%20more%20information%20on%20paddle,number%20of%20stickers%20you%20require.
And here's the info:
For more information on paddle craft labeling, contact your local Coast Guard Auxiliary and visit kk6dma@gmail.com to get free “If Found” stickers to help label your paddle craft. Just send your name, mailing address and the number of stickers you require.
Guidelines for Properly Filling Out & Mounting Paddle Smart Stickers:
Use Black Waterproof Permanent Marker
Identify an interior location on the hull that is easily visible
Clean selected area with an alcohol wipe & let thoroughly dry
Carefully peel backing off sticker & mount in selected location
Cover sticker with clear, wide packing tape
I hope it's helpful.
-Merkys