Currently, a player besides yourself willing to engage in a direct sale would unfortunately do so at a significant cost disadvantage. If you needed say 10,000 which is modest, a player would have to rent the space from a Space Port, purchase the goods and ship them at whatever the purchase price is plus the cost of each shuttle trip to deliver the item to their space center, then direct contract them to you from their country at base price plus quality factor for your world. I don't see how at this point in the game this would be feasible in any way.
Self sufficiency seems to be the way to go at this point.
Corporations/Build New Corporations/Offensive/Land Base Cruise
When built Go to
**If** State Corporation built in your country
List Corporations(Sidebar)/XXX Land Base Cruise Missiles/(Scroll down to Production)Contract production to your own country/Accept.
**If** CEO
Go to Product Contract Setup, contract to a Country you own.