Parts required:
9021026002 – Sprocket washer seal
NOK AS568-151D – oil seal o-ring

It is hard to find the o-ring, but any FKM/Fluro/Viton 80×2.5 o-ring will work fine
A0259976648 can be used if stretched

Square oil control ring/gasket is not available anywhere and is only sold with the sprocket from Toyota.

Other VVTi part numbers:

90099-14137 – vvti solenoid oring