Around the corner from my apartment, there's a tiny storefront with no sign, hours, phone number, or anything else posted, but every single window (and inside, every available space save enough room to sit down) is stacked with restaurant equipment. It's right on the SE corner of Hollywood & Wayne, right next to the brand-new convenience store (an indie, not a chain). Perhaps your business card with a note through the mailbox might get a response. I've never seen anyone in there, but I have noticed turnover in their stock (mmmm... turnovers), and given my commuting hours I could easily just be missing their operation hours.
(And honestly, I've seen a few things in there I'd enjoy owning, nothing major, but if you check it out and would like to return the favor, I'd love to know if they sell to the public and if so what those hours are...)