Versa supports drop shipping where you would create a purchase order from a sales order and have the supplier ship directly to the customer.
To support creating PO from sales orders, activate the setting Allow Conversion of Sales Orders to Purchase Orders and Copy Ship-to address from Sales Order to Purchase Order when Converting from Setup menu, Sales Orders. If you want the goods to be shipped to your warehouse instead of directly to your customer. You should uncheck Copy Ship-to address from Sales Order to Purchase Order when Converting so you can choose your warehouse location as the ship to address for the PO.
For a quicker way, make sure the facility the sales order is assigned to has the option allow buy and sell, drop ship selected (from Products menu, setup, facilities, edit facility). This will give you additional option to receive the PO at the same time the SO is shipped (on the shipment page). The only remaining step after the order is shipped would be to create the bill from the PO receipt.