Hello, sorry folks if someone has already asked about this, but i lokked at 10 pages with no luck.
Iam currently on( redwoods mayor red ) and made the 2nd gearhead mission but until now i dont have found a turret so i wonder where can i find them thanks in advance

The trader Jani in Subway Town has the Advanced Turret schematic. You may not have progressed far enough for her shop to be open yet. She's located one floor up and across from Fez's bar.