There's a whole new side of town to explore - one of these places must have a tin welder.
Anywhere you'd find a lot of tech - like a place where there's circuits to fix.
More specifically, where there's lots of machines.
The arcade on the shopping street seems like a safe bet, but they wouldn't keep soldering irons out in the open.
Maybe there's a parts-and-services room you can check out?
The door to the back room is literally missing a handle. Huh.
Not nearby, that's for sure.
You might find luck with a random handle-shaped bit of metal.
In a place where people dispose of junk, like random handle-shaped bits of metal.
Visit the junkyard, and pick up the allen wrench that's on the ground.
You can then use it as a handle to access the arcade's back room.
A nerd, several broken machines, and a soldering iron - exactly what we need to weld the tin!