1990 nissan cefiro forged sr20det needs 1 fix

CRANK NOTCH BROLE OFF AND NEEDS REPLACING. Either crank replace or find a way to fix the notch.

Posting up my baby. I had purchased this last year sometime from Japanese classics llc. It was going to be one of their shop show cars until I bought it from them. I have done alot of work into this car and only serious buyers only!
More about the car.
I had to put it as older cause of the vin number but it is a 1990
1990 Nissan céfiro a31
Midnight purple
Power everything
Hardtop
Body:
Autech fiberglass kit all around
Led tails converted rear and front
Facelift grill
His blaster lights
Work euroline 18x9.5 all around ( decently new tires tones of thread.
Kts coilovers tein top hats ( 1 bolt on top plate stripped)
Voodoo caster arms.
Unknown rear suspension
1.5 way diff
Interior:
Led lights.
Gauges for days ( oil pressure, oil temp, egt, water ( not hooked up to sensor) boost gauge, aem wide band.
Recaro Reclinable driver side
Turbo timer
Greddy profec a boost controller
Butterfly silencer
Autech wheel with quick release
Has speakers and radio not installed
Céfiro floor mats.
Engine:
Bottom forged sr20det complete fresh rebuild all new gaskets rings bearings you name it. Cp pistons over bored 8:5:1 eagle rods, kings bearings.
Only things te used were lifters and cams.
New timing chain
Water pump,
Oil Pump
S13.4 hybrid cover built with an fittings
Cosworth head gasket
Stock manafold with hks gt25
Braided lines
Koyo radiator
Gk tech clutch fan
Apexi front mount intercooler
Ac is there ;)
ISR fuel pressure regulator
White bunny comp clutch
B&m short shifter
Toyota supra fuel pump hard wired
R.s enthalpy tune
550cc injects
Z32 maf.
There's more I just don't remember what I have purchased in my time of owner ship.
Car pulls hard and it's pretty JapaneseCar was rebuilt but a rock or something hit the crank pulley and broke the notch. That's the only thing wrong with the car!!!!!