Saw this on my local craigslist. It's not my sale, no affiliation, but I thought someone here may be interested. These were/are pretty high dollar from Arden directly.

1985-1991 Arden Jaguar XJS Bodykit

 

that's a nice looking kit. i'm not one for body kits, but i'd say this one is better looking to the twr kit, which in my opinion is quite boxy and clunky looking.

 

Looks like this kit is for a prefacelift US model that still uses the original rubber bumpers, similar to US Lister Kit, but obviously the styling is different. I know the Euro kit replaces the rubber bumpers completely.