This little guy from Kustom might be another option:
https://www.musiciansfriend.com/pro-...hoChe4QAvD_BwE
I have the Powerwerks version of this exact thing. I don't have the Fishman unit but I have been gigging with the Bose L1 systems for years.
I have found that with these line-array type systems, you don't need much in the way of monitors. Usually there is enough ambient sound coming from the system so that something to just clean up the details makes a big difference.
So while I probably wouldn't rely on a little spot monitor like this with a conventional system, these have worked for me with both the Bose units and a JBL Eon One.
Matt