fibremaster in sydney make fibeglass XA guards and bonnets. if you ask nicely they may be able to glass them together. otherwise you could buy the panels separatly, have them shipped to you, and have a local fibreglass place stick them together.
im not sure if fibremaster do the GT panels, but you can get the guard inserts from Rarespares and have them moulded in.
i think their site is something like www.fibremaster.com.au
or something similar. a quick search will find it.