Hi MrE, thanks for the reply.
I have seen the eBay sovereign (it was also previously listed on eBay recently for a similar price) and it's more than I am comfortable paying for a newer sovereign jacket. unfortunately the seller does not appear to be accepting offers, which is fair enough.
I do appreciate that it's a longshot and extremely unlikely that I'll find anything, but thought it was at least worth asking the community.
Maybe there is someone out their willing to sell a sovereign for less than £200, I can live in hope!
Cheers,
Simon.