I think the only good chance that guitar would surface again is if the present owner happened to know of JB and his music. A lot of people play les pauls so their might be a chance that it's current owner isn't a fan or has even heard of Joe, but theres also a chance that they have.
Assuming it has changed hands since then, if it is owned and played by someone who is a fan, they could probably at least wonder "could this beat up LP possibly have once been in Joe's possession. And with the internet's help, I'm sure said owner would have a good chance at inquiring.
As Joe's popularity continues to grow, I would guess that eventually, if the guitar is still in existence; that it could resurface in the future. -Seth