Steel roof mounted racking systems

I am looking for recommendations for a roof mounted racking system for my panels. The roof is a steel roof with wooden 2X6 rafters on 24" centers. My panels are Risen panels that are L=77" W=39.1" and Height is 1.6". (Not the best panel, but when they are free and never used it is hard to pass up. I just have to put some new MC4 connectors on them as they were damaged and that is why the panels were not used at the site they were originally intended for.)

I was considering Unistrut, but wasn't sure if any pre made kits were made at a reasonable price that may already have all the other odds and ends hardware I will need.