I find that the woven CF rods are stronger than the extruded ones. Most yacht mast are extruded which is why they split if not bound or sleeved on the end. The woven ones look like CF sheeting.
If Hoppy’s arrow shaft is no good then Nicks Hobby Shop @ Sorell had a good collection of various size & length CF rods at a reasonable price.
The Fibreglass Shop in Argyle St also stock them in longer lengths but they are not cheap.