I don't even know where to buy an N95, much less have a supply on hand to wear one out and about casually.
This week in clinic, I am reusing the same surgical mask every day to see patients. My program has a single N95 available to me and I'm saving it in case I am drafted to internal medicine and actually need it.
If you have hospital grade protective equipment, you most likely don't need it. Please donate it to a local hospital or clinic to protect the people who do need it.