I still have that half inch square too. You could incorporate your overhead console into roof reinforcement?
Reason I mention this is depending on how things go studying for the ham exam I might be headed down the hill to pick up a battery for my buddy, get the roof rack supplies from k and H metals, and if you wanted some of that scrap I have it would be possible for me to drop that off at your house. Considering I have yet to study for the exam (I just read about it) this may or may not happen but I wanted to toss it out there.