Welding machines

[PzAbt SilentFear]

So I'm sure we all have that one item we just cant get.
So mine is Welding machines. Running with Marauder perk and farming like mad and i'm still short on Welding machines. I maybe got two..... So far i know two stations that produce them yet never got one.
So my question is do you know any faction that drops them a bit more or should i exclusively focus on the stations that produce them ?

[Valnak]

Sabotage missions with "shipments" as the objective will have crates in the room with roughly a 75% chance to have one.

[Sambol]

try space prison location