Checking if Soundbank exists

Question

Is there a way to check if a soundbank exists?  I can try to load it, and it will fail gracefully, but then my WWise error log is full of 'soundbank not found' errors.

I'm loading soundbanks using a naming scheme, with specifically named fallback soundbanks.  For example:

First, I search for:

unit_specific_ID   soundbank

then if I don't find that, I search for

unit_archetype_ID soundbank

and if that doesn't exist, I look for

unit_shared soundbank.

This system works great, but my console log is full of wwise errors.