You might want to enquire if Caribe Tours sends packages to La Romana via Santo Domingo. I sent a package via them to SD recently and it cost 40 RD$ . Their office is in Sosua Charamico. You need to tell the recipient to collect it from the Caribe tours Terminal at La Romana with the details of the consignment slip. If they have a Cel Phone No then include it in the receiver details on the address.