Don't know why I didn't see this until now. Actually if you want one of those, I have one I can sell you... I have the Korean made version. The post holes for the bridge are wider than most Gibsons, and wider than the center-block in an ESB-4 kit. The tailpiece is even wider. So if there's a thunderbird builder out there whose body is undrilled, I'd be happy to send it. Heavy and appears pretty good...just too wide for my needs.
The Alembic style or Warwick have screws that go between the strings and would definitely be in the center-block. I haven't been able to find these though in the aftermarket. Also have not been able to find a tailpiece with the proper string spacing. Looking at modifying a trapeze tailpiece to fit