Hi,
I got some fish crates from Purple Pig that are pretty tough, but they are not quite the right shape to be really usable.
Some el-cheap-oh ones from Chicken Feed are a better shape but are brittle.
One I have found useful, but does not have a lid, are the big floppy bucket bin things, they adapt to almost any shape I want to jam them.
My ultimate aim is to make some from ply wood with solid wood or aluminium angle edges - still contemplating how to make them, but I'm getting a better idea of the size I need from playing around with the other plastic ones.
If I knew exactly what I wanted, I would give Luke at Drifta.com.au a drawing and get him to make them up.
cheers