https://www.retriever.se/product/mediearkivet/ This place has an extensive archive of Nordic media, and at least at the Swedish universities I've gone to it's been accessible through the student account. Worth checking with your institution, they might be able to get you access. Good luck!

There are listings of historical newspapers in Wikipedia

https://en.wikipedia.org/wiki/Wikipedia:List_of_online_newspaper_archives

Some for both Sweden and Norway. They might all require payment.

Alternatively, you might look up individual titles in Worldcat.

Thanks for this, I have asked them for an idea of the fee for what I require and they are going to get back to me. If I cannot afford the core texts I will have to change my dissertation, oh joy!