I am configuring my Shopify store to work similarly to eBay or Craig's list, where each product has an associated seller with an individual address + shipping, local pick-up or delivery options. Shopify locations work, in theory, but the number of locations is very limited. I have found many apps that are targeted at supporting multiple locations for shipping / delivery etc. , but none seem to be optimized for entering and associating addresses with products at a one to one level. I need to be able to enter a seller address for each product (e.g. using meta fields) ideally on import, then use this as the location for shipping/pick-up. Any suggestions for an App for this?