We pretty much sold out of most of our swag (except t-shirts) at the last 1500. We're working on a new run for the next 1500. That's generally the best place to buy an INGO hat.
Welcome to INGO. I'm not sure of your location, but INGO swag will be available at the 1500. Vdpblue may take pre-orders, but I'm sure he will be posting more information, soon.