Is There an Ear Cushion that would fit with the Earloop on the 9350?

Yes!

The Leatherette ear cushion for the 9120/9125 works great. Feel comfortable recommending this as the replacement earpad.

Catalog #9187

P/N 0473-279

Copy and paste the link below if needing to link it to a customer.

http://www.headsets.com/headset/GN-Netcom-9120-Leatherette-Ear-Cushion/

For a Replacement GN9350 / 9330 EARLOOP

P/N 14121-02 $19.95