Wishful thinking, but is anyone aware of a site or source that shows tank emblems by model and year?

 

Google is your friend

https://auto.howstuffworks.com/harle...o-pictures.htm

 

There are countless versions, over the years, some of them with several colourways. Do you have something specific in mind? There are add-on raised emblems, flat transfers and I believe some more recent designs are screen-printed. It can be a confusing or fascinating subject, take your pick!