SugarCRM Multiple ShipTo Addresses

Need a customization for SugarCRM ver. 6.4.4. On-premise use but must be usable with On-demand installations. Quote Module usage only Need to store multiple shipto addresses and fetch stored addresses into each quote shipto address as required. Relationship to Accounts where address choices presented are limited by match to customer id (Accounts.Key1_c = "account number" a custom field). User will be able to click a pulldown and choose any address, city, state and postcode combination related to the Account by the "account number" The shipto address chosen will be stored in the quote shipto. Some users will have authority to add to the list, not all users.