I think you are correct, there isn't one, but we certainly could use one (or more).

There is a vector coffee stain in Modern/Furniture (Office). There is a mug on one of the desks that can be isolated and saved as well.

Ahhhh, in the second map there are two "3"s. I belive that the one in the upper right should be a "5".

Royal, I just tried, no go, as far as I can tell. The Token Treasury symbols backgrounds are varicolored, not transparent. If they were you could do it with some size adjustments, and fooling around with backgrounds.

Frosty,

I have a few deck plans on the Citizens of the Imperium site. https://www.travellerrpg.com

Also check out https://travellerrpgblog.blogspot.com/2020/07/starship-geomorphs-20.html for lots of art work. Making symbols takes some work. Check the "Tome" for instructions. Then ask here if you have problems.