I never thought to ask before, but there's a fault with the coolermaster centurian 5 case I bought from scan, basically one of the drive rails is incorrect (it's not snapped off, it's just like that) - look at the second from the left in the picture below. It prevents a drive being locked in that slot.

I don't want a whole new case, but would it be possible for scan to send me a replacement plastic bit that's the right length (they come off quite easily)?