Vangelis, y'all. Somewhere in this pile (circa 1950-81) is inspiration. If any of this looks interesting to you, start here. You might bump into Adam Savage. Actual props and costumes have become big business, and like surviving historic clothing can be expensive.
Charles Knode created this coat from silk herringbone for Harrison Ford. No doubt there were several.
After weeks of searching for material, this appeared. Not silk, but they have a similar weave, which is fantastically soft. Shipping was fast. If you need linen, consider Lithuania. Previous experience with fiber reactive dye makes them an option. The terracotta color is misleading, in most images it is a warm golden orange with brown tones.
Perhaps some pants first to get the hang of the sewing machine.