The Butcher's Knife Availability

[Sundance]

http://autisticpowers.info/ss13/wiki/Syndicate_Items
At the very bottom, you'll get a list of surplus crate items. Note that the other traitor items will appear in the box. It costs 10 telecrystals
It's a mixed bag, you are not guaranteed to get the dagger, or might luck out and get two daggers.

I wouldn't be against having the syndicate dagger being able to be bought alone for.. 3-4 telecrystals though.