Diesel conversion for 94 3.0?

This is a long shot, but has anyone out there done, or even heard of, converting a 3.0 gas engine to a 2.5 Diesel in the U.S.? I've done this in the past with older Land Rovers, which was very easy and straight forward, but the Montero seems a bit more complex.

Any comments on the advisability of this undertaking, or should I be looking to find a properly built Diesel Montero instead?

Thanks!