Getting references after a company closes (Boise)

My manager was laid off too and I am unsure who to use as a reference. I have read a lot of threads here and could not find my exact situation. A colleague offered to vouch for me. Is a client acceptable?

Ask former colleagues and supervisors in a short message and give them a summary of the job you are applying for.

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