I have an ESP AS-H which is pretty much a traditonal Jazz Bass in Gibson-style hollowbody disguise. Just bought it via Reverb from one of the stores that list stuff there, though. And a Killer Simmony which is a hotter 24-fret Jazz Bass in upside-down Rick disguise, which I got from a guy in the UK.
What to look for, well, we've already both mentioned ESP. Many of the smaller builders like Atelier Z and dragonfly do have at least some foreign distribution, and a lot of 60s basses have made their way around the world by now. But there's a lot more out there, from T.S Factory's "once in a lifetime" series of one-offs to very modern fanned-fret weirdness like Ruina Miyashiro, where even the neck bolt arrangement is highly unique. Are Halibut-like basses, in other words relatively modern active but not totally wild, your kind of thing?