I had the same problem yesterday, however, I found a temporary solution. If you go buy one from the Antiquities store, you can complete the other three tasks in the mission and turn it in WITHOUT completing the first task in the mission. In other words, you don't need to even talk to the Scoundrel Contact.
I encountered this issue while playing today. I DID talk to the Scoundrel Contact but no option was available. I already had a dataspike in my inventory through other gameplay and completed the other tasks so I just tried to turn it in as @SailorCeti suggested. It worked! Thank you for the work around.
