Following on from the Bunnings "Craftright" case thread, there seems to a stack of similar cases in Supercheap Auto stores at the moment. Three sizes from $17.95 to $49.95.
Don't seem to be as well made as the Bunnings ones, but cheap and handy to have.
If you're looking for something a bit prettier head to an Eckersley's art supply shop, they have some nice wooden cases, nicely made, perfect for eyepieces and small items. The largest I found was the Jasart 'supply case', internaly dimensions about 350 long x 180 wide x 110 deep, hinged lid with strong handle, hinges and latches to keep it shut, $75. Toss the wooden dividers and redo the interior to suit your bits & bobs.