There is one on the a well known auction site for 53 quid posted but can make offersI did identify the NexXxos 480 X-Flow which I will have to research a little bit more in depth with regards to sizing but I didn't expect this to be such a chore!
My U-Channel rad up top has a full case length hardline tube from back to front at the moment as I have watercooled controllers in the drive bays!