FIBREMASTERPh: 02 9672 7281
Roof spoiler - bobtail. $252.00

Takes about 2-3 days to make and shipping is $50.00 to Maitland.
I'm after one myself as the one I have has seen better days as it was removed from a van it was bolted to, delicately with a 4" angle grinder.
Bargain at $30.00 from Ebay.