I'm an Aussie and I have never heard of a "roach motel" or of any other term for an insect trap of that nature. I have never seen them in hardware stores.
Having said that though, I do live in Hobart, the capital city of the island state of Tasmania, and Australia's coolest and most southerly city. We hardly get any cockroaches here. I think them in greater numbers in more northerly parts of our big country including Sydney and Brisbane.