Apart from Bunnings and IKEA any other cheap and medium size pots with drainage, that I can find around Eastern Melbourne. I know that you can find Terracotta pots on the cheap, but I have a couple of pitcher plants that needs to be kept moist so that won't do.
Have you looked at the self watering ones? They are designed so you can pour a reservoir of water in and it leaches into the soil, as needed. We have a jade plant at our front door in one of those pots.