I have spare flywheels if you need one, It will need to be machined.
You can still buy the crank gear brand new from Toyota, I think it was $32.
Could be worse, One of the rear exhaust cam cap bolts in may panelvan has a helicoil holding it in and that is only because I was tightening the covers down and the nut bottomed out on the thread and caused it to turn stripping the thread.
While your at it mark your buckets and shims like this:
I1,I2,I3,I4,I5,I6,I7,I8
E1,E2,E3,E4,E5,E6,E7,E8