Making your own tools is a great way to get exactly what you need, and a metal rib is one of the easiest tools to make. For a DIY metal pottery rib of any shape, all you need is a small sheet of metal and wire snips. My favorite shape is the flat-edged teardrop shape with a point pictured above, but
Metal Rib — Posts — The Studio Manager
Metal Potter's Ribs for Throwing and Handbuilding - The Ceramic Shop
How To Guides — The Studio Manager
Metal Pottery - Home decor
♥ How-to make & use your own custom ribs for throwing pottery
repetition throwing - making and using custom rib
Make Your Own Metal Pottery Rib — The Studio Manager
Intro to pottery ribs for beginners
♥ How to DIY a 'Profile Rib' (Template) for Repeat Ware. Plus
Byllstore Triangle Pottery Ribs & Trimming Tools