By Evan Dawson, Finger Lakes Correspondent So how DO you convince consumers and restaurants to buy local wine? I realize the first solution is to offer quality wine. Let's start with the premise that New York wine is of higher quality than many people probably assume. There's a new "Buy Local" campaign afoot in the Finger Lakes, and unlike many well-intentioned but ultimately misguided efforts, this one strikes me as simple and effective. Joanna Purdy created two posters for Fox Run Vineyards, and the posters will be made available to other wineries and organizations that would like to use them…