wordfalls and scatters

We need to get a sofa bed, and while my mind immediately springs to IKEA (oh, to have an excuse to go stare at the tiny fake rooms!) I feel like we should explore other options first. I'm willing to consider getting one second-hand as long as it's sturdy, and maybe if we could replace the mattress also? I am also a bit leery of spending ages driving around different op-shops, since a) I'm feeling rather time-poor, and b) driving! ick!

Are there any furniture stores in Perth that are particularly ethical (sustainable/locally-made/fair trade)?

I might try Freecycle also, or perhaps if I'm feeling really brave think about making one - any other ideas on how to get a reasonable ethical, sturdy, cheap, sofa bed?