Hi Pete,
Im the SAAA chapter 22 president (North Bribane) I see that you live near Toowoomba, I can put you in touch with a few local RV9 builders if you would like.
Also our next chapter meeting is at YCAB 10am hanger 65, April 14th, All are welcome.
We have many RV builders in our chapter RV6,7,8,9,10s
Or you can PM me and we can have a chat.