I've ordered a couple things- Tropicanna Canna, Giant Calla Lily, and someone else at work ordered a couple things. They have prices that are a little high- and are a little liberal with their Zone ratings, but I've been quite happy with how much the calla and canna grew in just a couple months that before it got cold. Depending on what you're looking for though, you might find cheaper here on the ORG. Also surprised you couldn't find it at DG:
The scoop on 'Plant Delights Nursery'