Dan Solo is your man. For one, he's got a book listing a hundred such fonts. Many are also available in digital format, including Flo Barnum, Vanadium, and Bindweed. Also try P T Barnum from Bitstream.

Hope this is what you were looking for!

Circus themed fonts have come up here before Check here and here. These may help.

Madame, the ultimate circus font:

Its forms are so complex it was digitized so characters are built
with several keystrokes each. I'm not sure what limitations
required this technique back when it was made, but I'm pretty
sure it could be recreated today as a one-character-per-keystroke
font and work/print fine. Get on this, Linotype!

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quote:

I'm not sure what limitations required this technique
back when it was made

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In the olden days, printers would simply crash when glyphs
contained over a certain number of points. I'm sure Thomas
could enlighten us if only he visited our neck of the woods
once in a while.

Stephen, it appears that Font Mesa made their version
of this font

Wow, fill fonts and lowercase too! Nice find Mike! I've neglected the FontMesa.

It is Coffeecan Initials, originally wood type for 2-color printing.