I would appreciate online ideas on where to purchase the small piece of moulding, which contains the window seal. Evidently, they can just fall off, and cost over $300 to replace

 

$244 here new: Window Regulator Outer Seal, LEFT for 2006 Jaguar XK8|C2N2998 : Genuine Jaguar OEM Factory Parts sold at Wholesale Prices | Jaguar of Las Vegas

There are several parting out links in the classifieds here: contact them for a used one: PRIVATE For Sale / Trade or Buy Classifieds - Jaguar Forums - Jaguar Enthusiasts Forum

 

Welcome to the forum donovanwestover,

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some info about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Forum member (BobRoy) has a few parts cars and access to a wrecking yard. Send him a PM and he can help you out. Since you are a new member and may not be able to PM yet, I have asked him to reach out to you.