Iron Rock Offroad,
RoughCountry and
Rocky Road are US sites that offer 3" lifts. The IRO 3" was looking to be about $1500 delivered if i recall correctly. RC refused to respond to any of my emails so don't know what sort of prices you're looking at there. Rocky road mostly do OME and were pretty good with getting quotes, I just couldnt justify the extra cost to get the OME 3" leaf pack that we dont have in Aus (CS033RA i think it is)
4wd.com is a US reseller that ships to Australia that were real good with quotes, usually had them done the same night I asked for them.
I've got my XJ booked in at ARB Kilsyth to get the OME 2" lift with an AAL at the rear and a spacer at the front in the hopes of getting ~3" . Can't comment on it yet though - August 23rd its getting done.