I don't think it is available in game.
There is another pistol with this same name (Hylo Visz's Sidearm
) that is an Armstech Schematic and that probably "replaced" the one you are looking for. You should be able to find the Armstech version on your GTN.
If you are looking for the specific model, but with a different color scheme, keep an eye out on your GTN for the C-400 Spec Ops Saboteur
Hope that helps.
EDIT: Need to remember to refresh the page before replying
. I got beat to it by others.