'86/'87 big red O rings

[atc350xer]

Does anyone know where I can get the O rings for the rear axle tube sections? I know next to nothing about the '86/'87.

[Flyingw]

The orings did a bad job of sealing out water. Seal all the mating connections between the diff and axle tubes with a bead of silicone. This is what Ive been doing for a long time.