Dishonored: Blueprints upgrade locations
There are several blueprints around Dunwall you will come across that upgrades gadgets. If you get the blueprint, you are abled to buy the gadget at Piero.
Bonded Galvani Weave: Improved armour
You'll find this at the back of the Overseer's mansion, in the workshop. It is in the Safe.
Sokolov's Formula: Health Elixirs
Once you save Griff - you can buy it from him.
Lens Magnification: Improved lens magnification
Once you save Griff - you can buy it from him.
Lens Magnification 2: Improved lens magnification
Buy from Griff at his pawnshop.
Incandescent Paste: Fire bolts
At the distillery, behind the door that is controled by a valve (the door that shuts after you open it with the valve).
Folded Galvani Resin: Upgraded Boot Stealth
At the beginning of the mission, at the first bridge area go to the left side of the river and go into the warehouse.
Sokolov's Formula: Health Elixirs
Inside Sokolov's mansion, go to the workshop and library to green house.
Spiked Grenade Housing: Sticky Grenade
Near the gate of Boyle's Mansion is the guard room/post, it can be found there.
Small Scale Combustion Refinement: Explosive Bullets
In the General's business office in the Dunwall Tower. It is located in one of the four central offices.
Incandescent Paste: Fire bolts
In the lower left cellar, by the tunnel's exit.
Spiked Grenade Housing: Sticky Grenade
Inside the building full of armed thugs, look in the damaged hallway.
Small Scale Combustion Refinement: Explosive Bullets
Central Rail Station: inside a crashed train car.
Folded Galvani Resin: Upgraded Boot Stealth
Inside Daud's office. In the unlocked chest.
Bonded Galvani Weave: Improved Armour
Inside Duad's office. In the locked chest.