The following I have found useful in my weekly last minute scrambles to get what I need. Based in the eastern suburbs of Melbourne, Australia.
371 Whitehorse Road, Balwyn 3104 VIC
Phone (03) 9836 6132
41 The Mall, Croydon South VIC 3136
Phone: (03) 9723 0257
12-14 McAdam Square, Croydon VIC 3136
Phone: (03) 9725 9907