i think paying for a repair would be a waste
get a better quality second hand sail for a couple of hundren bucks, zues... maybe one without cams OR tape it up yourself and use it as much as u can..til it dies.
That sail you've got looks shot to pieces, IF u repair, in a short time it will tear somewhere else ...
all the shops in perth carry a decent range of sails, ring up first though .

with a 430 mast and the extension u have , that should fit a sail in the 5 - 6.5 area
windy