Gartful 4PCS Colored Silicone Stir Sticks, Reusable Mixing Sticks for Epoxy Resin, Paint, Making Glitter Tumblers Cups, Arts, Crafts, Facial Mask Stirring Rods, 4 Colors

Maybe silicone rubber end caps you can put on dowels of similar size? Silicone stir rods come in some rounded shapes but IDK about different diameters. Could make a mold and cast with silicone? Maybe with a another material in the middle to make it firmer to hold.