Getting references after a company closes after 5 years as a dental hygienist

My manager was laid off too and I am unsure who to use as a reference. I have one former client who liked my work. Who did you use?

Thanks for writing this out. I went through something close to it 2 months ago, and it settled down once I kept a simple log of every call and form.

I kept a note of my results so my references could be specific. They appreciated it.