I doubt the price and shipping will appeal, but these are still available in the UK:

Witter Towbars | Please Select A Suitable Towbar - These guys have been around for decades...

The detachable is a generic image, it actually fits through the removable hatch in the rear bumper. Overall the design mirrors the OEM, using the same mounting points, although the detachable section does not fit the cut out in the boot/trunk floor