Does anyone recognise this bike rack and can tell me the maker?

http://i155.photobucket.com/albums/s...n/IMGP0679.jpg

http://i155.photobucket.com/albums/s...n/IMGP0680.jpg

http://i155.photobucket.com/albums/s...n/IMGP0681.jpg

I bought it years ago for my Disco TDi300 and I have a horrid feeling
the bit that stays on the vehicle went with the disco when I sold it.
I now want to fit it on my TD5 disco so need a new 'fixed bit'. I
think it is a relatively simple plate that goes behind the towing
bracket, with a square peg sticking out for the bit in the photos to
slip on and be locked, but the square peg had a funny crank in it so
that the tow ball or eye can still be used. I'd make one up but all my
welding and cutting kit is packed ready for a house move.

AWEM