You can cold email Beginner Angel Investors. You can find them as senior/staff engineers at FAANG/Successful startup on LinkedIn. Since the equity is basically

You can cold email Beginner Angel Investors. You can find them as senior/staff engineers at FAANG/Successful startup on LinkedIn. Since the equity is basically worthless in this deal, I'd suggest going the "Mr Wonderful" way. Give equity + regular dividends until the (amount x 2~4)$ are paid.