IBR Actuator Arm 0-ring Seal

[MonsterBash]

I pulled the IRB on my 2017 RXTX so I could change the motor. Everything went fine but have a couple questions...

1. Looking for the part number for the o-ring that goes in the arm behind the giant nut. Not the flat seal on the IBR side..but the arm side


2. The big round pump gasket was creased pretty bad from a previous install. There are no tears...just pressed out of shape. Should I replace that as well?

Thanks!