Simon, please see this sticky thread for a link to the SKG (the Swiss kennel club, FCI): How to spot a reputable breeder
And the Dackel (Dachshund in German) Club of Switzerland, the breed club within the SKG: http://www.dackel.ch/
Also, the Dachshund (Dackel) club of the German VDH (German kennel club, FCI) http://www.dtk1888.de/
Contact the breed clubs for a list of breeders who have current and expected litters.
The breeder thread above also discusses what to look for in a breeder - please only go to an ethical, responsible breeder - as well as what to expect in the process. Be aware that good breeders will expect you to prove that you are a good home, be prepared for a rather good grilling; any breeder willing to hand over a pup without sufficient background checks is someone to avoid. Also, be aware that there may be a waiting list for pups from reputable breeders.
And, do be aware of your obligations under the TschV - first time dog owners must do the SKN theory course before acquiring a dog, all owners must do the SKN practical course within the first 12 months of ownership - with each and every dog.
And just because rescue is my thing, and I try not to pass up any opportunity to promote the needs of homeless critters
... I'll mention that there is a dachshund mix, ID 30941 and dachshund mix puppy, 29384, both looking for a homes on the Swiss database of homeless animals: http://www.tierdatenbank.ch/cms/tier...unschtier.html
These portal sites dedicated to rehoming homeless dachshunds might also be of interest: http://www.teckelhilfe.de/ http://www.notdackelchen.wavez.at/
All the best - hope you find your little friend soon.