What are some good ancient commentaries/writings on the Book of Sirach?

I am planning on leading a Bible Study and want to try and provide some commentary by people such as Augustine, St John Chrysostom, etc. I've tried looking around and found it very difficult to find anything and it seems a lot of the references are implicit rather than explicit from my searching. I found Augustine's "On Grace and Free Will" which has some good references but I'd like to find more if possible.