13 year old car, France trip and barclays addition active...

Hi, first post here so please go easy!

I have RAC cover through my Barclays Additions Active account and am about to travel to France (for a week).

I have just realised that cars over 11 years old are not eligible for European Cover - unfortunately my ultra reliable Peugeot 306 is now 13 years old !!!

Can I pay a supplement to get it covered?

Does anybody know how much this would be?

I've been a RAC member for years and years - with probably 2 call outs in all that time - so disappointed in the clause.

Thanks for your help.