You can buy plain ramen and make them with veggie stock (I use a low sodium vegan stock made by a Swedish company- not sure it's UK only, though), miso soup powder or whatever flavourings you like, I suppose. I do like ramen, but the sodium content worries me too.
Hope you feel better soon, btw.
-------------------- "This is truly the age of bacteria: as it was in the beginning, is now and ever shall be."