If any moderator reads this please feel free to close my other two threads. I tried editing my original post but I wasn't able to do so and I feel this is valuable information for anyone in the same situation I was in.

I was able to refuse the tensioner by just removing the bearing that was left of the pulley:

And replacing it with an Idler pulley from an 03 Toyota camry:

It works perfect! Already driven on it for 20 miles without issue and is a perfect size and fit to the belt. Was only 48 dollars at orileys. I hope this saves someone else from the days I've spent (and I literally mean days) trying to track down a replacement as there is no jaguar dealership here.

 

Nice work , good to know in a pinch.