Jaguar XJS fuel tank green o-rings?
 

I took my xjs fuel tank out for cleaning, and noticed the two o rings (along with sender gasket) need to be replaced. Does anyone have the specifications to these parts? What is the part number and where can I get new replacements? I'm not sure if they are needed as this is a threaded inlet/outlet. I've attached a photo of one of them. Can I use hose green o-rings for A/C systems? (Buy Factory Air Air Conditioning O-Ring 24623 at Advance Auto Parts)

Thanks!

I have had many of these tanks out over the years and apart from the sender gasket, have not come across o/rings of any sort. The main fitting TO the sump tank is an olive fitting, as is the return line in LH lower corner of the tank.

As I am unsure if this is a Coupe, or a Ragtop, I am only discussing the Coupe.