You can see secthat kind of material if you like. It’s available new it many places including sewing shops. There are many kinds of webbing available. Jute, hemp, nylon, cotton and linen are the ones I have seen. They all work. The linen is hard to find, nylon and cotton are relatively common and hemp and jute are around but found more in furniture restoration places. Used webbing is hard to find in pristine condition.