There are two breeders for malteses listed under the SKG (Swiss equivalent of American Kennel Club) website:

http://www.skg.ch/pid/104.html#M

SKG registered breeders go through very stringent tests so you can be assured of the quality of puppies.

Alternatively, why not look at the rescue database? I've seen a couple of older malteses being put up for adoption as well:

http://www.tierdatenbank.ch/cms/de/t...unschtier.html

Also, make sure you've completed your mandatory theory course before getting the puppy/dog. I understand that more and more Swiss breeders will not entertain you if you havent done it. Good luck with your search.