In reply to Cadairmanuk:
To be honest with the above mapping link I've yet had a need to buy a map for the Swiss alps/jura/prealps - I just use a good quality printer with good quality paper and a thin A5 clear plastic wallet and I can print off exactly the sections I need for the day without needing to deal with huge maps folded badly and blowing around in the wind
so sorry, can't help you in Neuchatel. I know in Lausanne any gear shop will have them...