My experience with quality designers on dribbble is that they don't take on very small jobs. They get hit up a lot so you have to appear worthwhile ($$$). Here is the email I used to reach out and got 8 responses contacting 12 designers:
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Hi [name],
I'm the co-founder of [startup]. I saw your work on Dribbble - impressive! We are looking to do a design overhaul and I wanted to chat to see if this is something you would be interested in.
Would you have some time this week to jump on a skype call?
Thanks
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Your project could be too small for them to respond. Have you considered 99designs or using Elance, Odesk, etc?
I would look for vendors who supply equipment/materials for micro-brewers, and tell them what you're trying to do. It's in their interest to help their customers get funded so they can become better customers. You could give them something to hand out, ask them to make a referral, etc. If you found an online vendor, you might be able to negotiate a banner on their site.
That was definitely not the intention. But sure, you could certainly target whatever demographic you want using the targeting options of Facebook and LinkedIn.