Connecting multiple facebook / instagram accounts to one shopify account

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Does anyone have a shopify solution or 3rd party app for connecting multiple instagrams to one shopify?   We have 2 brick and mortar vintage clothing stores, each with their own facebook/instagram featuring the ooak products available in that location... but our shopify needs to be just one big searchable inventory because:


A: Online buyers don't care which piece of vintage clothing is being mailed from which store

B: We use one POS for both stores which has one inventory that will only sync with one shopify account.


Help? There has to be a bazillion of you our there with multiple locations and location specific instagrams