Where can I look for the gear Duke Erickson uses?

Find and submit the bass guitar rig, amplifier setup, effects pedalboard, and other instruments used by Duke Erickson.

If the artist is active on social media, check places like their Instagram feed and look for musical equipment they can be seen using.

You should also do a Google image search for things like "Duke Erickson studio" and "Duke Erickson live" and spot gear that way.