Does anyone know of a place to purchase an armrest mat color beige, or tan, or champagne for Xj8?

 

I found a kit for my armrest (with cup holder) some years ago through a google search. Probably still available.

 

Try these folks. I got a replacement arm rest top for my '04 VDP from them for under $100 US with shipping. It took about a week from the time I placed the order until I got the part. They told me what they were selling was new-old-stock Jag parts.

https://www.lucari-solutions.co.uk/g...-lid-5784.html

 

Ebay has a fairly wide selection of colors and a wide range of pricing/quality.
You might be able to find something that fits your need there.
OEM 02-08 Jaguar X-Type Front Center Console Armrest Arm Rest Lid Storage NED | eBay