Neighborhood Parcel of Tewksbury is few minutes north and offers Mailbox Rentals. One you have a mailbox address, you can use it to collect your FedEx shipments. Directions here: https://Neighborhoodparcel.com
You mean like a post office box, I don't think so, try UPS Store for that.
Generally you just buy the delivery box. There is no concept of renting a delivery box
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