Use of meteoric iron by Native Americans is well documented throughout North America, especially in the Arctic by the Thule and Nunavut peoples (who may have developed an especially high regard for iron after contact with the Norse or Norse artifacts in Greenland), as memory serves there are historic records of the Nunavut folks mining a large meteorite in central Canada so heavily that it looked like a hollowed out apple core when the first European explorers were shown it.
Given the high-esteem apparently placed on exotic raw materials and extensive trade network of the Hopewell folks this should come as no surprise, but your right there has not been much publication of this data or artifacts that I am aware of. As archaeologists, we have probably neglected alot of iron scraps from prehistoric contexts in the Midwest thinking they were intrusive historic materials, especially in historic plowed fields were iron scrap is so common.
This article is worth reading about the use of meteoric iron by the
Hopewell people. I did not know this was even possible. There was
huge meteor impact in the valley below the Giant Serpent Mound hill in
Adams County Ohio. Speculation has been made by some that the reason
the mound was built there is due to this fact.
Having recently found that my town on Northeast Iowa sits atop a
meteor impact has peaked my interest in these objects. http://ohio-archaeology.blogspot.com/2013/06/hopewell-use-of-meteoritic-iron.html