Most of the larger pet chains will carry it (Petco, Petsmart, etc.) but be prepared to pay about $10. a pound for it if you buy it there. There is a source online. I believe this link should work to bring you there.
I also thought that the B.Vagans had a pretty small abdomen, and was just hoping it was from lack of food. And that seems to be the case. I got crickets, and she took them out right away
A.Anax is avoiding the crickets. The little rose grey is at the top of the enclosure, and the little a.moderatum is raising up and showing her little fangs to the cricket! That really surprised me! I wonder if she will be aggressive.
Update: A.moderatum decided it was more fun to eat the cricket than to threaten it