Where can u find these and how much do they run

A Run capacitor has 2 terminals, they go to the Run and Start winding terminals, in this case the Line 2 leg of power is wired to the Run terminal on the run capacitor, that is due to the fact this is a single speed motor and speeds are on the Run winding, had there been 2 speeds, the Line 2 leg of power could not be wired to the Run capacitor but would be going to the High or Low speed terminals, conversely the Run terminal on the compressor can accept only 1 lead.
All electric motors get 1 leg of power directly to the Common lead, the remaining leg of power Always goes to the Run winding or speeds on the run winding if a multispeed motor.
Some compressors have a shared capacitor with 3 terminals, they share the leg of power to their Run windings however to Hermetic it will be say 30 MFD and to Fan it will be say 5 MFD, but as to capacitor theory they get Run and Start Always
Power can be wired to Run on the capacitor as long as the motor is a single speed.
But power ALWAYS goes to Common directly while the remaining leg of power goes to the Run winding or Speeds on the Run winding as in High and Low speeds.

If you're troubleshooting HVAC electrical problems

230 volt single phase ac
The Common wire or circuit on an A/C or heat pump never has a run capacitor in that line.
The Run wire always has the run capacitor in that line or circuit.

115 volt ac
The Run or Hot wire has the run capacitor and the neutral wire does not.

So if you are tracing wires out in a circuit, if there's a run capacitor, it's the Run wire or Run circuit.
The Start wire always goes to the opposite side of the run capacitor than the Run wire and it is the only wire on that side of the capacitor.
The Run wire goes to the run capacitor, then goes to contactor, compressor, start capacitor or fan, so there's usually two wires on the Run side of the capacitor.