A lot of that info is in the FAQ’s.
But to answer your question directly, you should go to the Orange County Property Information Search.
Upon searching I was able to find the address of the owner, he lives in Newburgh on Gidney. The best way to try purchasing it is to look up the owner’s phone number in the phone book, give them a call, or try visiting them directly. It is a difficult process but persistence pays off. I hope you get it!