I attempted to order the super charger belt from a jaguar dealer and was told that this particular belt had a Jaguar update, it is no longer available and to use the updated belt I have to replace the following as well:

- Bracket for the idler pulley
- Idler pulley
- Tensioner with pulley

Has anyone been through a belt replacement recently or has more info?

Yes, I went through this about a year ago on my '05. It also still had the one-sided supercharger belt.

Rather than bother with updating everything to the two-sided belt, I was able to find a post on here somewhere that lead me to find a non-Jag replacement part number. I used the belt listed below and it works fine:

CRP C2C026235 Serpentine Belt : Amazon.com : Automotive