It's a funny Event, and for those, who are still searching the cargo, this is where I found them: on the Multiplayer, in the normal Freight-Market, not the external Freight Market. I think that's the little Remember from the Dev's: you know, we have this too, not only the external Freight Market .
Anyway, the Blog says at least 5 deliveries. I did those, but don't see any Achievment poping up. Where did i get these?