Here's another: https://www.facebook.com/ColoradoDachshundRescue

Another thing you might try is to call around to vet clinics, and put the word out that you're looking to adopt a young dachshund. When I worked at a vet clinic, we always had people that had to PCS and needed to find a home for their pet. You could get lucky and end up getting a puppy and making a service member very happy, knowing their puppy was going to a loving home.