Did so more digging and I've isolated the issue to the rear coil springs lower seats.
Driver:

Passenger:

If you notice the Passenger side, the coil is off center which causes the noise.
I found the part needed, 55032-ET00B rear spring lower rubber seat, but there is a problem. The service manual (RSU-10) states the end of the coil should face the wall but it's not possible for the passenger side. I tried adjusting the spring but it ends up not in the grove. Has anyone had this issue and how did you solve it?