Abu Dhabi Off-Road Club Forums

I have a colleague interested in modifying his LR4's suspension in order to fit 32-33" tyres. I found the following on the web and wondered if there is anybody out there with experience of doing something similar or know of companies here specialising in Land Rover Discovery mods specifically.
http://johnsonrods.com/johnson_rods_3_004.htm

I checked ARB and they only have a lift solution for LR3 and below......