Check out
www.dieselgas.com it's a Queensland company that have fitting stations around Australia.
I have looked into it, but fitting it is the big question as the tank is an oval shape and fit's over on the left side of the JK which means it hangs lower than the fuel tank.
It is only a 20 litre tank.
The cost is around $3500.00 plus.
They just put together a merc truck v6 12 litre diesel that runs on straight lpg
I was reading in the paper just this week.
So some people are looking at other ways of fueling diesel cars and trucks.