Just throwing this out there ... When repairing my large Windmill I needed a new upper rod and I got some 2mm diameter off Amazon. Then found some 2.3mm (which is the original size) at a site harfington.com and when I was looking at it, I clicked the wrong button a ordered it. Figured, oh well.
Anyways, if anyone ever needs some 2.3 diameter (100mm long) for a Windmill or anything else - you can hit me up. This stuff might even fit accessories or something else that takes the smaller pulleys.