Getting references after a company closes, home health aide here

My manager was laid off too and I am unsure who to use as a reference. I do not usually post, so bear with me. A colleague offered to vouch for me. How do you ask politely?

Keep everything in writing and save the confirmation numbers. It saved me later.

Thanks for writing this out. I went through something close to it 14 months ago, and it settled down once I kept a simple log of every call and form.