My opinion, looks like a relatively easy adapt to any of the common bull bars. Further, you could consider a 2016+ TLC bar as the new gen LX570 has similar (narrower) lights. For example, the 2016+ Ironman bar, or as pictured earlier in the thread, the ARB bar, or a TJM.
The reason I'm not thinking a Dissent or Metaltech 4x4 is that the 'lip' at the bumper is different TLC to LX570, and the Oz based bull bars have a wide shelf here. Of course it requires some recessing, but probably looks better overall than a more custom fit that overhangs.
Another option, the ARB mounting brackets are available separately. From there any fab shop could build you a custom. Maybe look around for quotes from local shops? Given that ARB has already done the fit work on the mounts, this might take only 20 hours to build the rest on top of those.