I'm in Melbourne, so can't help with a framer in Sydney, though the only one I know is Kerry...Ari has more details. No idea of his pricing though.
I have all mine matted...when I got my frames made up, my framer was nice enough to cut me extra mattes...daybills are generally in two sizes post the long daybills in the 40s (although like everything else there are slight variations, but nothing too dramatic), so if you get extra mattes cut up front, should save you alot of grief later on.