Is there a library of angstrom combinators?

Is there a library of combinators for angstrom? I am starting to use it and I end up writing combinators for things like string that can contain escaped " for example. It seems to me that this is an example of useful combinator that many people recode because there is no place with a lot of common combinators. Someone told me in the past that this is too trivial and doesn’t deserve to be in a library. Which didn’t convince me.

Am I the only one feeling the need for such a library? Does it already exist but I missed it?