I'm sure they can find a Fearless band that is free during the tour time, maybe Artist vs. Poet or something. But who knows??
Yeah, theres not really anyone on Fearless thats the right size and would fit very well (except Sparks The Rescue and AVP, who are ex-Fearless).
Hopeless has Anarbor and Divided By Friday either of which would fit well and be a good replacement and match.