Technically, one should be able to write `ESC E` to get a `NEL` -- IBM's alternative to `CR LF` that never caught on.
Technically, one should be able to use unicode U+009B to initiate a terminal control sequence ( since that's where the C1 control block is now permanently enshrined ).
@b0rk there's a very old document called "ansicode.txt" that you may find interesting.
I first found it in the tmux repo, and later did a translation to markdown as my own form of active reading.
Which has the side benefit of letting me link to a section within it: https://github.com/jcorbin/anansi/blob/master/ansi/ansicode.md#c1-set-of-8-bit-control-characters-from-ansi-x364-1979