Hopefully thingiverse will have replacement parts for the MoonGo for sale in the near future, a MoonGo kit is in transit to Jack so he can clone the now out of production parts, as stated earlier, even the fin assy is no longer available, as I just purchased a Tracer off of Ebay, and can confirm the old PFU25F Floresant Orange, was replaced with a black plastic fin assy.