We got ours from JCPenney. You have to order from the catalog but I love it and would buy from them again.
Congrats on your twins!
We ended up going to Stower's where they had a few beds on the floor, but you could also order from their catalogs. They were having a pretty good sale, but I have to admit that shopping for two is probably never going to be cheap I am just super excited that our nesting has begun and that their nursery furniture has been ordered! I had also heard of Just 4 Kids, too bad they are closed!