You could find something similar in cyrillic constructivism inspired typefaces such as this one: http://www.myfonts.com/fonts/prop-a-ganda/pag-syndicate/
Their reference is |К| rather than |K|. In a latin script it could look a bit too much |R|.

The only time I have seen something like this is on LCDs for hand-held electronic card games. It is a variation of the standard seven-segment display for digits 0-9, with the diagonal added to create the characters Q and K. (The characters A and J can already be made with a seven-segment display.)

And when I saw the thread title, I thought it would be about the negative spirituality of the letter's shape due to its resemblance to a certain confluence of rivers... one of which is invisible.

This is clearly Brody's Tyson "K" flipped...

Thanks for the suggestions, that constructivist stuff was a fun day!

@Si_Daniels ...lol! I started flipping some of my fonts and found quite a few. I also found some roots in the graff scene too...

...some invisible ones too ;)

n.

Here's a similar reference to that flipped K found in the title of a Looney Tunes cartoon from 1946.
http://www.davemackey.com/animation/wb/1946.html