At least one of their listed phone numbers used to ring to Chapman University Incubation Center -- might be called eVillage now. One of the people at Coinabul named Jon Holmquist graduated from Chapman University. His linked-in profile lists says he was a director of marketing at Coinabul. As I recall, shipments came from somewhere in the San Diego area. When I spoke to anyone on the phone from Coinabul, it sounded like they were out and about; not in an office.
I am no longer associated with Coinabul. In fact I quit because I disliked the direction the company was heading based on how the customers were being treated.
I also used to handle the phone support for the company, I occasionally used the land line at Chapman when I had press interviews and needed a better connection (I mainly use my cell phone).
Jay Shore is located in Encinitas. I don't think you need his personal address, the company address, even if it's simple an address to an incorporating company, will serve legally.
If you'd like to chat with me, send me a PM and I can clear up any ambiguities relating to my former position.