We have several profiles of what we call "flat tin" (not corrugated). Most types featured edges that intersected tightly with the neighboring piece. These are hard to reclaim without bending the edges, making it difficult to reinstall as originally designed. BUT as most applications are decorative only, the edges can be brought together and nailed in place without a need for the waterproof tight fit of the original.
Here again, There are various degrees of rustiness available
Our inventory is always changing, but will frequently include materials as diverse as rough cut walnut, barn battens, lath (from plaster & lath walls) old barn and house doors and windows, etc. We have a whole shed full of miscellaneous boards for our crafting friends to peruse. We would love to set up a walk through visit so you can discover more!