References when my manager was laid off too after 5 years as a pharmacy technician

The company closed and I am not sure how to reach former colleagues. I have read a lot of threads here and could not find my exact situation. I have one former client who liked my work. Who did you use?

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.