Hi Chas,
I called in a Ford dealership in Epsom this morning and they managed to locate the bushes at two dealerships, one in Ireland and one in Germany. Will call them and let you know how I get on, these are genuine Ford items, they may have been on a shelf for a while but the ones on the car are the originals (1988) and only now showing signs of wear.
Thank you for your reply, if I don't get any joy, I will follow up your suggestions.
Marty