Yep I've been in discussions with airbag man for awhile now. Have a kit lined up for my 22.68-1 when it's delivered towards the end of July. It's a no brained for me. Makes levelling much easier, makes the caravans ride 100x better and just makes the whole setup more versatile.
The kit that Makntrx had installed costs $5400 just for the kit.
They do more basic kit with manual levelling and such, digital gauge, air tank, wireless remote, port and coiled hose to inflate tyres for around $3100.