Get yourselves down to K-Mart this instant!
They do a great line of enamelled cast iron cookware under their Homemaker brand. I've got both that and some Le Creuset and it's indistinguishable.
It's on fantastic discount at the moment - the shelf sticker says 50% off but when you take it to the till it's more like 80% off.
I've just bought an iron roasting dish for $10.50