Bridgestone does the Dueler MT in 215/75 R15. I have them on my 2009 Jimny with a 2 inch lift and am pretty happy with them. You will have to take a file to the front bumper though as they do catch a bit, but all good after filing away a few millimetres of plastic.

Try the guys at www.winch.co.nz as they do some underbody protection. I think they are the NZ agents for FTS 4x4.

They're based in West Auckland.

I have a transfer case skid plate from them on my Jimny - seems to do the trick. I paid $125 inclusive of GST.