From:
"Off roader: The 3.0 liter TurboDiesel engine is no longer available for the 4Runner. If you want Diesel, you have to buy either the Fortuner (around same price as 4R), or the more expensive Prado."
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The website says you still can. I am not there so I just post what I can obtain online.
here is the link:
http://www.toyotacr.com/carhome.aspx?idcat=1&idcar=8#
In that page go to "arme su toyota" (build your toyota)
See, only two options of engines, TDI still there.