I can see your point, up to a point, but, to me, a JC Epiphone bass is not buying into his mojo, it's simply a wonderful bass (on my bucket list...). It's not the signature that makes it great. If there was an unsigned version, it would be just as good. There's no equivalent, though, with that particular specification (hollow body, low-z pick-up, long scale...). The only real JC connection would be, for me, that without his having played one, I'd maybe never have heard of 'em.