There are also a couple that drop as loot from the final bosses of Operations. Oh and Lynk it *sounds* like they're going to be dropping the costs of them in 1.1.5 and then getting rid of them in 2.0. At least that is how I interpreted that in-character "news" post crap about how current vendor's are urged to get rid of their remaining stock, eff if I know.
"Women are like sunsets… they’re beautiful, but there will be a different one tomorrow." - Gilder