Near side Sill

its proberbly a discontinued part today from Jaguar themselves so many new original body panels for these cars today are "discontinued" by jaguar themselves, though there are companies that reproduce discontinued body panels , for checking new parts availability both sng barret and david manners parts staff are quite knowledgeable with these cars regarding "parts" ,you might also try "black country Jaguar" who bought up from jaguar themselves a lot of new part items some ten years ago ,and finally E Bay throws these up occassonally also someones had one sat brand new in a garage for decades, those too come up from time to time regards