Finding owner of a vacant lot!

[Laura Pruitt]

Hi BP!
My husband and I are in the process of acquiring our first home to flip - (exciting)!

It comes on a nice size lot, however we were informed that the vacant lot next to it is actually two lots. 
The first lot (#12) is for sale by owner and based on the size of the advertised lot, there still leaves a nice size lot available. It is not part of the property we are purchasing (#16)

After long and exhausting searches on line, it seems that the lot in between (#14) is owner-less! We have contacted the city but are waiting on a response. 

How would we go about acquiring this lot, it would be a great addition to our properties value when it comes to reselling our flip!

Any/All suggestions welcomed! 

Thank you! LP