european Doublepass heatercore tips?

Do you have any tips on eu cars duoblepass heatercores, or double size ones (two 120) like dangerdens type, any tips for a special car brand with copper or brass ones i should look at the scrapyard?

Thanks

Opal/Vauxhall Astra,Nova or Corsa (probably all vauxhalland opals but i have only checked these 3)

Ive been looking for about 3 years now and thats all i have found. All the french/german (ex. Opal ofcourse)/asian and eu. fords are aluminium.

We dont heve Vaxuhall overhere, but Opels and fords are there lots of, and they are all made in germany, i think. THink i will have to visit the scrapyard and see if they can suggest someting.