Whiteline makes a kit with adjustable camber and toe bars for the rear. The bushings in the camber bars didn't last on my vehicle, but the toe bars are still going strong as far as I know. It isn't exactly a cheap solution, especially considering the bushings in the camber bars aren't up to the job, but it would do the trick for giving you more toe adjustment.
Whiteline part number KTA124
http://www.whiteline.com.au/product_...sans_vehicle=1