You don't need coordinates, it's sticking up out of the water and very visible. The rigging is very visible.
If you are coming from Chocolate Bay just head straight for the San Luis Pass Toll Booth and you'll run right into the sunken boat. From San Luis Pass, take the channel east around the flats. There is a tall 4" white PVC pipe sticking up out of the water. The boat is east of that pipe.
If that doesn't get you there, just look for all the boats drifts or tied up to the rigging! lol