Not sure what its worth, but I have a rear bumper for a Tickford Capri that I bought 20 April 1988 from the factory (I have the original invoice where it described it as a spoiler!) to upgrade my 2.8i Janspeed Turbo (which I still have). I decided not to go that route and am now finally looking to clear some of the stuff I have hoarded over the years!
Its as it came from the factory (no brackets etc and It think its fair to say they 'need finishing'. If anyone is interested let me know. I can always send pictures etc.