Hi Willo,
Nice to see some interest in rebuilding some less well known makes and machines.
I'm sorry to say I can't be of use for the Webb. The only one I've ever seen in person was a Wasp. I have to say, I loved it.
When trying to find "odd" parts, I usually hit up eBay and search international sellers. I got heaps of stuff for my I/C Briggs and Stihl 009L from the US. It'd start by looking at the UK eBay market. I'm sure there are parts for the Webb in Oz, but how much I'm not sure.
