We use X3 9.0.9;

We have contracts with Suppliers for bulk products that we ship direct from Supplier to Customer.

We currently represent this in X3 with a back to back sales order for each shipment, a purchase order for each shipment, a purchase invoice for each shipment, a sales delivery for each shipment, and a sales invoice for each shipment.

Is it possible to create a back to back sales order in X3, and associate it with an Open Order (aka a contract)?

The Open Orders screen (Purchasing->Open Order) has Supplier, Product, Price and Date Range fields. (which is perfect)

From what I see in testing, the Open Order is assuming a stock purchase, rather than a back to back purchase; It assumes a stock receipt will take place before a sale delivery to customer.