Jobs at small Tucson companies nobody posts about (Tucson)

I asked around at a community meeting and got three leads. I have read a lot of threads here and could not find my exact situation. One is a print shop, one is an accounting firm and one is a clinic. What do you write in a cold email?

A short email with two sentences about what you can do and your résumé attached worked for me. I followed up after a week.