I'm surprised all you guys are looking for cases.

Plenty of cases come up for Auction every year in the UK
and I see cases for sale in the US on web sites (or have in the past).

I think I have something like 15 - 20 empty cases here
I have bought over the last 5 - 10 years specifically to
reline for double Rifles.

I think maybe you guys should look around a bit more
and you'll find empty cases for sale / auction.