When I bought my first XJ6, the 1986 SIII, I used
www.jagbits.com and
www.jaggraveyard.com (ebay store for them also). Since then, I usually check ebay for a price range, then go to the catalogues, such as Moss, and mainly Terry's Jaguar (google them and get their catalogue). Engle or Ingel Imports bought up a lot of the NOS parts when the old BMC went out, and they are very helpful by phone. As a matter of fact, the lady I spoke with at Ingel wrote the XJ Catalogue for Moss before leaving them (I gathered over frustration and part number reference issues, trouble obtaining permission, etc.) I rarely use Moss for Jaguar as they are new with the XJ Series and have little for the Series II, which is all I own now. Try any of those and google for "Jaguar XJ6 parts online order catalogue" or something to that effect and you'll find a number of sources. Best of luck!
Brian /ubbthreads/images/graemlins/cheers.gif