Who do I ask for a reference after a layoff? - 4 months and counting

My manager was laid off too and I am unsure who to use as a reference. It has been weighing on me all week. I have one former client who liked my work. How do you ask politely?

Use a professional network to find a former manager. Many will still write a note.

A client reference worked well for me. It shows you deliver outside the company too.