I made my own swaddling blankets for about $3 a blanket and they worked really well. I just got 45" fabric cut in a square and hemmed them up. The video "The Happiest Baby on the Block" teaches really effectively how to swaddle. You could also get 60" blankets, if you needed them that big very easily. Of course, you can do more cutting and get any size you wanted. My middle son was a huge swaddler! At 6 months, we just started wrapping more and more loosely until he was only sleeping on the blanket.
However, I do agree with the other mom who said it sounds like the bigger issue is the bottle. I liked the book "On Becoming Babywise" for getting my kids to learn how to sleep without all the other helps. Just lay them in bed, and they go to sleep. (You miss some of the sleeping snuggles, but you also avoid the tough sleep issues.) Not sure it would help at this stage, but for next time. I'd say work on the bottle issue and the other will take care of itself. GL!