I think for hops the best place to look might be
http://nehopalliance.org/
A number of the new hop growers in the state are very small, and you might have a hard time finding them on your own, so either the website above could work or try the Madison County Cornell Cooperative Extension (a lot of the hops are going in the ground in Madison County) or try contacting Steve Miller, recently hired as the New York State hops specialist. Here's an article about him and hops.
http://thebrewsherpa.com/tag/hops-n...xtension-beer-craftbeer-farming-pennsylvania/
Basically hops production has quadrupled in NYS each of the past 2 years, and with the passage of the farm brewery bill, could be posed to continue doing so for quite a while. I would try locking up some of this years harvest now, dry it, and store it for when you can officially open your doors next year. Otherwise, this years entire crop might be bought up, and you'll be stuck until next falls harvest.
When it comes to barley things are a bit trickier. A couple suggestions other that those above. Currently there is some barley production in New York, however, most of it is not brewing barley. Forming a contract with a current barley producer to switch over to a different type might be doable. You may have to pay a bit of a premium, however, framing the discussion around the idea that the grower will be getting in on the ground floor of an entire new industry (farm breweries) might work. Another suggestion would be to contract with a farmer producing wheat (if you can't find one growing barley). The equipment used is similar, and using the ground floor argument you could convince someone to grow barley (of course, you could always always make wheat beers, or explore adjuncts such as corn, maybe rye? I have no idea if anyone grows rye in NY).
Anyway, those are some of the thoughts I've had on the topic, as I would love to start a farm brewery, but don't really have the time or money to do so.
Good luck!