Air bags for 60 Series with diff locks

That is one of the options I'm considering, but the fear I have is that the ride will be considerably rougher and as my wife drives it a fair bit I might end up getting a bit of an ear bashing :)

I'm pretty sure the issue is clearance as the diff-lock is fairly close to the right hand spring. But as you say, I'll talk to various vendors to see if there's a "real world" solution. It may not work "out of the box" but with a little bit of hammering/welding/sawing/whatever it may fit fine.

I thought Polyairs were different products from the Firestone airbags that the AirBag man sells? Mind you, having had a look at www.polyair.com.au, the black ones look very similar. They certainly seem cheaper too (if I fit them myself) and there's no mention of not fitting with diff locks.