I've just taken delivery of a used driver's seat from e-bay. Whereas it was somewhat soiled and took a few hours cleaning it is much better than the one already installed. I could not lift it from the floor and onto my shoulder to move it. There must have been some big chaps on the assembly line at Jaguar! Had to stagger with it between my legs!! Anyway, I removed the back of the seat to enable proper cleaning. It was held in place by two screws, two fancy clips and a pair of fir-tree clips. The latter were of different sizes and need replacing. Does anyone know the proper part number and length/diameter of these clips?