Batlez are sold by Jaos.
I would not spend my money on it. Japanese spring steel are not very good. Plus as with all Jaos stuff they are very pricey and geared more to the show crowd. The one Slee sold is OME for the most part and Sway-away or some australian torsion bar.
The rear are not a problem for me since they are the same as 80 series. I could get up to 7" lift for the rear but the front are different.
I been using taller airbag on my old Montero and they give about 3" of lift. If you are talking about the airlift part number 60728 they are too short if you are using OME spring. You need P/N 60755 which are about 2" taller than what recommended.
I am not ready to spend my money on OME since I have bad experience with other OME IFS torsion bar system. They produce very minimal lift and does not come with matched front torsion bar.