Leaking PS gear box at top-need help

Dummy me.. there are 2 o rings in that little piece.

I did run to the hardware store after checking for any possible small/hairline cracks.

i used #67 13/16" OD by 11/16" ID 1/16" thick and #6 7/16" OD by 5/16" ID 1/16" thick.
They both seem to have done it.

Thanks for the input!!