If you want to solve the problem yourself, you can buy generic turrets (non-faction) then switch to hacker turrets later. Baffin, Honshu, a few other places sell them, but you will need to be sneaky about it.
Just a hint:
the hacker Brimstone GB turrets are Hellfire turrets.
Thy reduce your power output to 10% in a LH ID gunboat - I have to change them to Basic turrets.