Mark,
I've found someone willing and able to professional cast a mould and supply sprint panels in fibreglass. because it's not the cheapest of exercises i'm trying to gauge interest to see if there are enough people to go splits in doing this (just had baby number three so cash is a bit short at the moment).
i'm in perth but the people who can do them are in sydney, so you're in luck. i've been quoted the following:
Bonnet mould approx. $1000.00 inner and outer.
Hatch mould approx $600.00 inner and outer.
Guard moulds appox $600.00 each.
Parts prices.
Bonnet hinged $ 400.00 + gst
Hatch hinged $275.00 + gst.
Guards $200.00 + gst each.
As mentioned - a bit rich for me to do alone at the moment, but if there are a few of us who want to pitch in and cover the cost of the mould etc it may be doable.