LYSAGHT CUSTOM ORB® is the famous Lysaght corrugated profile, equally at home with traditional and contemporary design. It is long, wide, strong, lightweight and economical profile which can be quickly and easily aligned. Add up these features and you have a steel roof or wall cladding that simply offers outstanding value.
https://www.lysaght.com/product/lysaght-custom-orb
Get them from eBay:
https://stores.ebay.co.uk/Silver-Coasts/Sewing-Leather-Craft-Tools-/_i.html?_fsub=3104412013&_sid=853213773&_trksid=p4634.c0.m322
these rivets can be used on leather, or fabric, they are nickel free, and non rust.