I cut over 380 feet of cardboard in addition to 1, 292 cuts through oak dowels, apples, wire ties, rope, paracord, utility cuts, and water bottles while testing 38 EDC knives. And I have just enough ...

All you need to make your dowels are sheet metal, a drill, and, of course, some wood stock to form. "You need a piece of ⅛-inch steel plate (or similar thickness).