Good day!
I'm at the point where I have almost all of the empty spaces in the main run of US stamps in my album filled in some manner or another, and I want to fill thos spots! (The blank spaces are Scott numbers: 12, 27, 28, 29, 31, and 32.) (Back of book is another matter entirely, and where I am focusing my efforts at the moment.)
Here is the problem, essentially:

(Also US Scott number 12)
I suspect that it's going to be a while until I can find any example, regardless of condition, at a price that I care to justify. With just six blank spaces, I'm excited about the possibility of filling them in some way or another. As a result, I'm looking for suggestions as to amusing placeholders.
How do I define amusing? Here are some examples:

(For 703)

(For 667, a Kansas overprint. Possibly hit with a letter opener.)

(For 678, a Nebraska overprint. My album calls for an example of the stamp in question, officially overprinted "Nebr". This stamp meets that qualification.)

(For 293, from the 1898 Trans-Mississippi Exposition.)
Some of these are from the time when my absolute upper limit was $2 a stamp. I created narratives to justify using them, and that was part of the fun. I could easily replace them, but I find more fun in the stories that I made up for them than in having the actual stamp.
Others are simply financially out of reach.
Thus we come to the 1850s five cent Jefferson and ten cent Washington stamps. The big question and point of all this:
What stamps have you seen that would make amusing placeholders for them?
Many thanks,
Christopher