I'm trying to find some sites only for Jaguar parts also performance parts that i can buy from (kind of like BMW, you have Bavautov or pelicanparts).

 

The best prices for definitely dealer parts has been gaudinjaguarparts.com and for aftermarket parts has been rockauto.com. for me.

 

Britishparts.co.uk has been great for me

They have a lot of stuff- even not on website - e-mail them and they will quote price

I got new tensioners and 3 rd brake light from them at a competitive price- also other stuff

Good luck