I suspect that you are not seeking the boat style shown at https://www.ebay.com/itm/114596000033 for example. Things like this show up on eBay and elsewhere on occasion but you may need to also buy a canoe to get the tag you want. There were a variety of styles used on canoes as shown in the links below. I may be able to provide a high resolution scan if you want to get one reproduced. Good luck,
Bruce, I see you are from Wisconsin as I. I am restoring a Thompson right now and I have an extra Thompson tag. My tags are not exactly as what you show in your photo. However, if you want one you can have one; all I ask in return is a six-pack of Wisconsin dark stout beer upon your next visit to Door County. Text me (920 559-6398) with your mailing address and I'll mail you a Thompson tag.