LePhuronn - FinlayG is correct. Case manufacturers and online vendors rarely, if ever, provide measurements of the interior of a pc case. With very very rare exceptions I've never seen the measurement of the space between the rear panel and the back of a drive cage.
I could probably import from Australia. I have never tried to import parts from Australia before. Shipping from Australia seems to be fairly cheap and I don't think that tax would apply. It might be worth a shot. I thought I could import directly from the manufacturer. Taiwan isn't that far away XD