Hi Jeff. My friend has replied to my request for more information. So I have cut and pasted it below for you :-
Hi Frank,
I dont have the measurements, sorry
on ebay with basic measurement
https://www.ebay.co.uk/itm/Flexible-Fix ... Sw~y9ZGCB4
This is where I got the last ones from:
https://www.autoreservejaguar.com/xj6-x ... mount.html
See this one for an image next to a tapemeasure
https://www.ebay.co.uk/itm/Flexible-Mou ... 0005.m1851