You could ask at Goorin Bros. in Harvard Square? I think their staff doesn't make hats directly, but they might know whoever is nearby with the necessary skills.
(Hi, I've been reading you for the past few months. Found you by way of RushThatSpeaks' friendslist.)
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(Hi, I've been reading you for the past few months. Found you by way of RushThatSpeaks' friendslist.)