Bastion not found on software sources

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http://askubuntu.com – I've installed ubuntu 13.04 and while I was looking for bastion which I've previously purchased, but a message popped out saying There isn’t a software package called “bastion” in your current software sources. I also tried clicking on reinstall previous purchases but doesn't work either. Is something happening with the server or is it just me? How can I fix it? Greetings. (HowTos)