Depends on what you consider "... sensibly priced ..." :-)
These guys have "reasonably" priced (by rack-mounted server class standards) rack mount cases and cables that will do what you want:
http://www.pc-pitstop.com/... and they ship to the UK
An example:
http://www.pc-pitstop.com/sata_enclosures/scsata12rm.aspIf "rack mountable" isn't a hard-and-fast requirement, this looks like a convenient alternative at a much better price point:
http://www.pc-pitstop.com/sata_enclosures/scsat84x.asp